diff --git a/.github/workflows/django.yml b/.github/workflows/django.yml
index f45f710..a5e6700 100644
--- a/.github/workflows/django.yml
+++ b/.github/workflows/django.yml
@@ -17,8 +17,5 @@ jobs:
     - name: Setup Poetry
       run: make install-poetry install-packages
 
-    - name: Get all containers up and running
-      run: cp sample-dev.env .env; make hr-docker
-
     - name: Run Django tests
       run: make test
diff --git a/.gitignore b/.gitignore
index 1178587..7e91c20 100644
--- a/.gitignore
+++ b/.gitignore
@@ -160,9 +160,7 @@ pyrightconfig.json
 # Ignore all local history of files
 .history
 .ionide
-.env
 .python-version
-.env
 .vscode/settings.json
 db.sqlite3
 
diff --git a/Makefile b/Makefile
index 5334c4b..4ce0307 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ SRC_DIR = src
 TEST_DIR = tests
 POETRY_RUN = poetry run
 DOCKER_COMPOSE = docker-compose
-TEST_CMD = $(POETRY_RUN) python manage.py test
+TEST_CMD = $(POETRY_RUN) python manage.py test --settings=nau_financial_manager.test
 LINT_CMD = $(POETRY_RUN) black .
 PRE_COMMIT = $(POETRY_RUN) pre-commit run --all-files
 RUN_CMD = $(POETRY_RUN) python manage.py runserver
diff --git a/README.md b/README.md
index c036978..5be4200 100644
--- a/README.md
+++ b/README.md
@@ -76,12 +76,6 @@ poetry env use 3.11.4
 poetry shell
 ```
 
-## Create .env file for enviromnent desired
-
-```bash
-cp sample-dev.env .env
-```
-
 ## Run for DEV
 
 Start the app's dependencies services:
diff --git a/config.yml b/config.yml
new file mode 100644
index 0000000..78e6056
--- /dev/null
+++ b/config.yml
@@ -0,0 +1,9 @@
+# This is default configuration settings used to development purposes.
+# We can override any default Django setting.
+# The good default setting value should be the default value of the 
+# 
+#   CONFIG.get("KEY", <default value>)
+#
+
+# Currently we are just enforcing the debug.
+DEBUG: True
diff --git a/docker/Dockerfile b/docker/Dockerfile
index bf30861..36c9718 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -58,4 +58,6 @@ COPY poetry.lock pyproject.toml /app/
 # Install packages via poetry:
 RUN poetry install --verbose
 
+ENV FINANCIAL_MANAGER_CFG=/app/config.yml
+
 USER ${USER}:${USER}
diff --git a/docker/docker-compose-app.yml b/docker/docker-compose-app.yml
index 7192580..5dfa7fe 100644
--- a/docker/docker-compose-app.yml
+++ b/docker/docker-compose-app.yml
@@ -4,12 +4,10 @@ services:
 
   nau-financial-app:
     container_name: nau-financial-app
-    restart: always
     command: sh -c './wait-for-mysql.sh && python manage.py runserver 0.0.0.0:8000'
     build:
       context: ../
       dockerfile: docker/Dockerfile
-    env_file: ../.env
     # on docker mode change use the container directly
     environment:
       - DB_HOST=nau-database-mysql
diff --git a/docker/docker-compose-dependencies.yml b/docker/docker-compose-dependencies.yml
index 17af046..63c0cc3 100755
--- a/docker/docker-compose-dependencies.yml
+++ b/docker/docker-compose-dependencies.yml
@@ -3,28 +3,29 @@ version: "3.5"
 services:
   database-mysql:
     container_name: nau-database-mysql
-    restart: always
     image: mysql:8.1
-    env_file: ../.env
+    environment:
+      - MYSQL_DATABASE=nau_db
+      - MYSQL_USER=nau_user
+      - MYSQL_USER_ROOT=root
+      - MYSQL_PASSWORD=nau_password
+      - MYSQL_ROOT_PASSWORD=nau_password
     hostname: database
     ports:
       - "3306:3306"
 
   redis:
     hostname: nau-redis
-    restart: always
     image: redis:latest
     ports:
       - "6379:6379"
 
   celery:
     hostname: nau-celery
-    restart: always
     build:
       context: ../
       dockerfile: docker/Dockerfile
     command: celery -A nau_financial_manager worker --loglevel=info
-    env_file: ../.env
     volumes:
       - ../:/app
     depends_on:
@@ -33,12 +34,10 @@ services:
 
   celery-beat:
     hostname: nau-celery-beat
-    restart: always
     build:
       context: ../
       dockerfile: docker/Dockerfile
     command: celery -A nau_financial_manager beat --loglevel=info --scheduler django_celery_beat.schedulers:DatabaseScheduler
-    env_file: ../.env
     environment:
       - DB_HOST=nau-database-mysql
     volumes:
@@ -52,8 +51,6 @@ services:
       context: ../
       dockerfile: docker/Dockerfile
     command: celery -A nau_financial_manager flower --port=5555
-    env_file: ../.env
-    restart: always
     volumes:
       - ../:/app
     ports:
diff --git a/nau_financial_manager/settings.py b/nau_financial_manager/settings.py
index c8cf468..d31ff4d 100644
--- a/nau_financial_manager/settings.py
+++ b/nau_financial_manager/settings.py
@@ -9,17 +9,48 @@
 For the full list of settings and their values, see
 https://docs.djangoproject.com/en/4.2/ref/settings/
 """
+import codecs
+import copy
+import os
 from pathlib import Path
 
-from decouple import Csv, config
+import yaml
+from django.core.exceptions import ImproperlyConfigured
+
+
+def get_env_setting(env_variable, default=None):
+    """Get the environment variable value or return its default value."""
+    try:
+        return os.environ[env_variable]
+    except KeyError:
+        if default:
+            return default
+        else:
+            error_msg = "Set the {} environment variable".format(env_variable)
+            raise ImproperlyConfigured(error_msg)
+
+
+CONFIG_FILE = get_env_setting("FINANCIAL_MANAGER_CFG", "./config.yml")
+
+# Load the configuration from an YAML file and expose the configurations on a `CONFIG` object.
+with codecs.open(CONFIG_FILE, encoding="utf-8") as f:
+    CONFIG = yaml.safe_load(f)
+
+    # Add the key/values from config into the global namespace of this module.
+    __config_copy__ = copy.deepcopy(CONFIG)
+
+    vars().update(__config_copy__)
+
 
 BASE_DIR = Path(__file__).resolve().parent.parent
 
-SECRET_KEY = config("SECRET_KEY")
+DEBUG = CONFIG.get("DEBUG", False)
 
-DEBUG = config("DEBUG", default=False, cast=bool)
+SECRET_KEY = CONFIG.get("SECRET_KEY", "change-me")
+if SECRET_KEY == "change-me" and not DEBUG:
+    raise ImproperlyConfigured("For security reasons you need to change the 'SECRET_KEY'.")
 
-ALLOWED_HOSTS = config("ALLOWED_HOSTS", cast=Csv(), default="localhost")
+ALLOWED_HOSTS = CONFIG.get("ALLOWED_HOSTS", ["127.0.0.1", "localhost"])
 
 DJANGO_APPS = [
     "django.contrib.admin",
@@ -83,16 +114,24 @@
 
 WSGI_APPLICATION = "nau_financial_manager.wsgi.application"
 
-DATABASES = {
-    "default": {
-        "ENGINE": "django.db.backends.mysql",
-        "NAME": config("MYSQL_DATABASE"),
-        "USER": config("MYSQL_USER_ROOT"),
-        "PASSWORD": config("MYSQL_PASSWORD"),
-        "HOST": config("DB_HOST"),
-        "PORT": config("DB_PORT"),
-    }
-}
+# The normal Django `DATABASES`` setting
+DATABASES = CONFIG.get(
+    "DATABASES",
+    {
+        "default": {
+            # The DB_HOST needs to be overridden from environment variable because we have 2 modes
+            # of running on the development mode, one from docker and another outside docker.
+            # Each modes connects to MySQL host differently.
+            "ENGINE": get_env_setting("ENGINE", "django.db.backends.mysql"),
+            "NAME": get_env_setting("MYSQL_DATABASE", "nau_db"),
+            "USER": get_env_setting("MYSQL_USER", "nau_user"),
+            "PASSWORD": get_env_setting("MYSQL_PASSWORD", "nau_password"),
+            # Default mode it the development mode without docker
+            "HOST": get_env_setting("DB_HOST", "127.0.0.1"),
+            "PORT": get_env_setting("DB_PORT", 3306),
+        }
+    },
+)
 
 REST_FRAMEWORK = {
     "DEFAULT_PERMISSION_CLASSES": ("rest_framework.permissions.IsAuthenticated",),
@@ -105,33 +144,38 @@
     ],
 }
 
-CELERY_APP = "nau_financial_manager"
-CELERY_BROKER_URL = config("CELERY_BROKER_URL", "redis://nau-redis:6379/0")
-CELERY_RESULT_BACKEND = config("CELERY_RESULT_BACKEND", "django-db")
-CELERY_CACHE_BACKEND = "default"
-CELERY_TASK_TRACK_STARTED = True
-CELERY_ACCEPT_CONTENT = ["application/json"]
-CELERY_TASK_SERIALIZER = "json"
-CELERY_RESULT_SERIALIZER = "json"
-CELERY_RESULTS_EXTENDED = True
-CELERY_BEAT_SCHEDULER = "django_celery_beat.schedulers:DatabaseScheduler"
+# Celery settings
+CELERY_APP = CONFIG.get("CELERY_APP", "nau_financial_manager")
+CELERY_BROKER_URL = CONFIG.get("CELERY_BROKER_URL", "redis://nau-redis:6379/0")
+CELERY_RESULT_BACKEND = CONFIG.get("CELERY_RESULT_BACKEND", "django-db")
+CELERY_CACHE_BACKEND = CONFIG.get("CELERY_CACHE_BACKEND", "default")
+CELERY_TASK_TRACK_STARTED = CONFIG.get("CELERY_TASK_TRACK_STARTED", True)
+CELERY_ACCEPT_CONTENT = CONFIG.get("CELERY_ACCEPT_CONTENT", ["application/json"])
+CELERY_TASK_SERIALIZER = CONFIG.get("CELERY_TASK_SERIALIZER", "json")
+CELERY_RESULT_SERIALIZER = CONFIG.get("CELERY_RESULT_SERIALIZER", "json")
+CELERY_RESULTS_EXTENDED = CONFIG.get("CELERY_RESULTS_EXTENDED", True)
+CELERY_BEAT_SCHEDULER = CONFIG.get("CELERY_BEAT_SCHEDULER", "django_celery_beat.schedulers:DatabaseScheduler")
 # WORKAROUND TO CELERY USING MYSQL
 DJANGO_CELERY_RESULTS_TASK_ID_MAX_LENGTH = 191
 
-
-REDIS_URL = config("REDIS_URL", "redis://localhost:6379/")
-REDIS_HOST = config("REDIS_HOST", "nau-redis")
-REDIS_PORT = config("REDIS_PORT", 6379)
-REDIS_DB = config("REDIS_DB", 0)
-
-CACHES = {
-    "default": {
-        "BACKEND": "django.core.cache.backends.redis.RedisCache",
-        "LOCATION": config("REDIS_URL", "redis://localhost:6379/"),
-        "KEY_PREFIX": "naufm",
-        "TIMEOUT": 60 * 15,  # in seconds: 60 * 15 (15 minutes)
-    }
-}
+# Django Cache settings
+#
+# By default it uses the Redis as Django Cache.
+#
+# The next configuration is used for development proposes.
+# If you need to change this for a specific environment update the `CACHES` key
+# on the `FINANCIAL_MANAGER_CFG` yaml file.
+CACHES = CONFIG.get(
+    "CACHES",
+    {
+        "default": {
+            "BACKEND": "django.core.cache.backends.redis.RedisCache",
+            "LOCATION": "redis://localhost:6379/0",
+            "KEY_PREFIX": "naufm",
+            "TIMEOUT": 60 * 15,  # in seconds: 60 * 15 (15 minutes)
+        }
+    },
+)
 
 AUTH_PASSWORD_VALIDATORS = [
     {
@@ -160,14 +204,18 @@
 
 DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
 
-# Transcation processor settings
-TRANSACTION_PROCESSOR_URL = config("TRANSACTION_PROCESSOR_URL", "")
-IVA_VACITM1_FIELD = config("IVA_VACITM1_FIELD", "")
-GEOGRAPHIC_ACTIVITY_VACBPR_FIELD = config("GEOGRAPHIC_ACTIVITY_VACBPR_FIELD", "")
-USER_PROCESSOR_AUTH = config("USER_PROCESSOR_AUTH", "")
-USER_PROCESSOR_PASSWORD = config("USER_PROCESSOR_PASSWORD", "")
+# Transaction processor settings
+TRANSACTION_PROCESSOR_URL = CONFIG.get("TRANSACTION_PROCESSOR_URL", "")
+IVA_VACITM1_FIELD = CONFIG.get("IVA_VACITM1_FIELD", "NOR")
+GEOGRAPHIC_ACTIVITY_VACBPR_FIELD = CONFIG.get("GEOGRAPHIC_ACTIVITY_VACBPR_FIELD", "CON")
+USER_PROCESSOR_AUTH = CONFIG.get("USER_PROCESSOR_AUTH", "")
+USER_PROCESSOR_PASSWORD = CONFIG.get("USER_PROCESSOR_PASSWORD", "")
 
 # Invoice host information
-INVOICE_HOST_URL = config("INVOICE_HOST_URL", "")
-INVOICE_HOST_AUTH = config("INVOICE_HOST_AUTH", "")
-INVOICE_HOST_PASSWORD = config("INVOICE_HOST_PASSWORD", "")
+INVOICE_HOST_URL = CONFIG.get("INVOICE_HOST_URL", "")
+INVOICE_HOST_AUTH = CONFIG.get("INVOICE_HOST_AUTH", "")
+INVOICE_HOST_PASSWORD = CONFIG.get("INVOICE_HOST_PASSWORD", "")
+
+SWAGGER_PROJECT_NAME = CONFIG.get("SWAGGER_PROJECT_NAME", "Nau Financial Manager")
+SWAGGER_PROJECT_VERSION = CONFIG.get("SWAGGER_PROJECT_VERSION", "1.0.0")
+SWAGGER_DESCRIPTION = CONFIG.get("SWAGGER_DESCRIPTION", "API for Nau Financial Manager")
diff --git a/nau_financial_manager/test.py b/nau_financial_manager/test.py
new file mode 100644
index 0000000..66554e4
--- /dev/null
+++ b/nau_financial_manager/test.py
@@ -0,0 +1,9 @@
+from .settings import *
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': "test.db",
+        'ATOMIC_REQUESTS': True,
+    },
+}
diff --git a/nau_financial_manager/urls.py b/nau_financial_manager/urls.py
index d3096d9..a122b62 100644
--- a/nau_financial_manager/urls.py
+++ b/nau_financial_manager/urls.py
@@ -14,7 +14,7 @@
     1. Import the include() function: from django.urls import include, path
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
-from decouple import config
+from django.conf import settings
 from django.contrib import admin
 from django.urls import include, path
 from drf_yasg import openapi
@@ -23,9 +23,9 @@
 
 schema_view = get_schema_view(
     openapi.Info(
-        title=config("SWAGGER_PROJECT_NAME", default="Your project name"),
-        default_version=config("SWAGGER_PROJECT_VERSION", default="1.0.0"),
-        description=config("SWAGGER_DESCRIPTION", default="Your project description"),
+        title=settings.SWAGGER_PROJECT_NAME,
+        default_version=settings.SWAGGER_PROJECT_VERSION,
+        description=settings.SWAGGER_DESCRIPTION,
     ),
     public=True,
     permission_classes=(permissions.AllowAny,),
diff --git a/poetry.lock b/poetry.lock
index 75b61fb..a98120b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.5.1 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.7.0 and should not be changed by hand.
 
 [[package]]
 name = "amqp"
@@ -976,17 +976,6 @@ files = [
 [package.dependencies]
 six = ">=1.5"
 
-[[package]]
-name = "python-decouple"
-version = "3.8"
-description = "Strict separation of settings from code."
-optional = false
-python-versions = "*"
-files = [
-    {file = "python-decouple-3.8.tar.gz", hash = "sha256:ba6e2657d4f376ecc46f77a3a615e058d93ba5e465c01bbe57289bfb7cce680f"},
-    {file = "python_decouple-3.8-py3-none-any.whl", hash = "sha256:d0d45340815b25f4de59c974b855bb38d03151d81b037d9e3f463b0c9f8cbd66"},
-]
-
 [[package]]
 name = "pytz"
 version = "2023.3.post1"
@@ -1010,6 +999,7 @@ files = [
     {file = "PyYAML-6.0.1-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:69b023b2b4daa7548bcfbd4aa3da05b3a74b772db9e23b982788168117739938"},
     {file = "PyYAML-6.0.1-cp310-cp310-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:81e0b275a9ecc9c0c0c07b4b90ba548307583c125f54d5b6946cfee6360c733d"},
     {file = "PyYAML-6.0.1-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:ba336e390cd8e4d1739f42dfe9bb83a3cc2e80f567d8805e11b46f4a943f5515"},
+    {file = "PyYAML-6.0.1-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:326c013efe8048858a6d312ddd31d56e468118ad4cdeda36c719bf5bb6192290"},
     {file = "PyYAML-6.0.1-cp310-cp310-win32.whl", hash = "sha256:bd4af7373a854424dabd882decdc5579653d7868b8fb26dc7d0e99f823aa5924"},
     {file = "PyYAML-6.0.1-cp310-cp310-win_amd64.whl", hash = "sha256:fd1592b3fdf65fff2ad0004b5e363300ef59ced41c2e6b3a99d4089fa8c5435d"},
     {file = "PyYAML-6.0.1-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:6965a7bc3cf88e5a1c3bd2e0b5c22f8d677dc88a455344035f03399034eb3007"},
@@ -1017,8 +1007,15 @@ files = [
     {file = "PyYAML-6.0.1-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:42f8152b8dbc4fe7d96729ec2b99c7097d656dc1213a3229ca5383f973a5ed6d"},
     {file = "PyYAML-6.0.1-cp311-cp311-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:062582fca9fabdd2c8b54a3ef1c978d786e0f6b3a1510e0ac93ef59e0ddae2bc"},
     {file = "PyYAML-6.0.1-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:d2b04aac4d386b172d5b9692e2d2da8de7bfb6c387fa4f801fbf6fb2e6ba4673"},
+    {file = "PyYAML-6.0.1-cp311-cp311-musllinux_1_1_x86_64.whl", hash = "sha256:e7d73685e87afe9f3b36c799222440d6cf362062f78be1013661b00c5c6f678b"},
     {file = "PyYAML-6.0.1-cp311-cp311-win32.whl", hash = "sha256:1635fd110e8d85d55237ab316b5b011de701ea0f29d07611174a1b42f1444741"},
     {file = "PyYAML-6.0.1-cp311-cp311-win_amd64.whl", hash = "sha256:bf07ee2fef7014951eeb99f56f39c9bb4af143d8aa3c21b1677805985307da34"},
+    {file = "PyYAML-6.0.1-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:855fb52b0dc35af121542a76b9a84f8d1cd886ea97c84703eaa6d88e37a2ad28"},
+    {file = "PyYAML-6.0.1-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:40df9b996c2b73138957fe23a16a4f0ba614f4c0efce1e9406a184b6d07fa3a9"},
+    {file = "PyYAML-6.0.1-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:6c22bec3fbe2524cde73d7ada88f6566758a8f7227bfbf93a408a9d86bcc12a0"},
+    {file = "PyYAML-6.0.1-cp312-cp312-musllinux_1_1_x86_64.whl", hash = "sha256:8d4e9c88387b0f5c7d5f281e55304de64cf7f9c0021a3525bd3b1c542da3b0e4"},
+    {file = "PyYAML-6.0.1-cp312-cp312-win32.whl", hash = "sha256:d483d2cdf104e7c9fa60c544d92981f12ad66a457afae824d146093b8c294c54"},
+    {file = "PyYAML-6.0.1-cp312-cp312-win_amd64.whl", hash = "sha256:0d3304d8c0adc42be59c5f8a4d9e3d7379e6955ad754aa9d6ab7a398b59dd1df"},
     {file = "PyYAML-6.0.1-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:50550eb667afee136e9a77d6dc71ae76a44df8b3e51e41b77f6de2932bfe0f47"},
     {file = "PyYAML-6.0.1-cp36-cp36m-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:1fe35611261b29bd1de0070f0b2f47cb6ff71fa6595c077e42bd0c419fa27b98"},
     {file = "PyYAML-6.0.1-cp36-cp36m-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:704219a11b772aea0d8ecd7058d0082713c3562b4e271b849ad7dc4a5c90c13c"},
@@ -1035,6 +1032,7 @@ files = [
     {file = "PyYAML-6.0.1-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:a0cd17c15d3bb3fa06978b4e8958dcdc6e0174ccea823003a106c7d4d7899ac5"},
     {file = "PyYAML-6.0.1-cp38-cp38-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:28c119d996beec18c05208a8bd78cbe4007878c6dd15091efb73a30e90539696"},
     {file = "PyYAML-6.0.1-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:7e07cbde391ba96ab58e532ff4803f79c4129397514e1413a7dc761ccd755735"},
+    {file = "PyYAML-6.0.1-cp38-cp38-musllinux_1_1_x86_64.whl", hash = "sha256:49a183be227561de579b4a36efbb21b3eab9651dd81b1858589f796549873dd6"},
     {file = "PyYAML-6.0.1-cp38-cp38-win32.whl", hash = "sha256:184c5108a2aca3c5b3d3bf9395d50893a7ab82a38004c8f61c258d4428e80206"},
     {file = "PyYAML-6.0.1-cp38-cp38-win_amd64.whl", hash = "sha256:1e2722cc9fbb45d9b87631ac70924c11d3a401b2d7f410cc0e3bbf249f2dca62"},
     {file = "PyYAML-6.0.1-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:9eb6caa9a297fc2c2fb8862bc5370d0303ddba53ba97e71f08023b6cd73d16a8"},
@@ -1042,6 +1040,7 @@ files = [
     {file = "PyYAML-6.0.1-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:5773183b6446b2c99bb77e77595dd486303b4faab2b086e7b17bc6bef28865f6"},
     {file = "PyYAML-6.0.1-cp39-cp39-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:b786eecbdf8499b9ca1d697215862083bd6d2a99965554781d0d8d1ad31e13a0"},
     {file = "PyYAML-6.0.1-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:bc1bf2925a1ecd43da378f4db9e4f799775d6367bdb94671027b73b393a7c42c"},
+    {file = "PyYAML-6.0.1-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:04ac92ad1925b2cff1db0cfebffb6ffc43457495c9b3c39d3fcae417d7125dc5"},
     {file = "PyYAML-6.0.1-cp39-cp39-win32.whl", hash = "sha256:faca3bdcf85b2fc05d06ff3fbc1f83e1391b3e724afa3feba7d13eeab355484c"},
     {file = "PyYAML-6.0.1-cp39-cp39-win_amd64.whl", hash = "sha256:510c9deebc5c0225e8c96813043e62b680ba2f9c50a08d3724c7f28a747d1486"},
     {file = "PyYAML-6.0.1.tar.gz", hash = "sha256:bfdf460b1736c775f2ba9f6a92bca30bc2095067b8a9d77876d1fad6cc3b4a43"},
@@ -1287,4 +1286,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10.2"
-content-hash = "b187091d553caf4d4e77ac88047e700d61de380b151c17c0bc9255153ba0b139"
+content-hash = "7274a7e9da1df349bef9ddc5d7baf8d2d42286d82e9e5673d81820195a4b2df2"
diff --git a/pyproject.toml b/pyproject.toml
index 4895fee..eb63139 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,6 @@ readme = "README.md"
 [tool.poetry.dependencies]
 python = "^3.10.2"
 django = "^4.2.4"
-python-decouple = "^3.8"
 pre-commit = "^3.3.3"
 black = "^23.7.0"
 flake8 = "^6.1.0"
diff --git a/sample-dev.env b/sample-dev.env
deleted file mode 100644
index 415bd94..0000000
--- a/sample-dev.env
+++ /dev/null
@@ -1,36 +0,0 @@
-SECRET_KEY=django-insecure-89x(2gbrxdo8z-7g3no54j2eagxr=awkrrr*g&hv*#uwh5^ui1
-DEBUG=True
-ALLOWED_HOSTS=localhost,127.0.0.1
-
-# DATABASE
-MYSQL_DATABASE=nau_db
-MYSQL_USER=nau_user
-MYSQL_USER_ROOT=root
-MYSQL_PASSWORD=nau_password
-MYSQL_ROOT_PASSWORD=nau_password
-DB_HOST=127.0.0.1
-DB_PORT=3306
-
-SWAGGER_PROJECT_NAME=Nau Financial Manager
-SWAGGER_DESCRIPTION=API for Nau Financial Manager
-SWAGGER_SERVE_INCLUDE_SCHEMA=False
-SWAGGER_VERSION=1.0.0
-
-CELERY_BROKER_URL = 'redis://nau-redis:6379/0'
-CELERY_RESULT_BACKEND = 'django-db'
-
-REDIS_URL = redis://localhost:6379/
-REDIS_HOST = 'nau-redis'
-REDIS_PORT = 6379
-REDIS_DB = 0
-
-TRANSACTION_PROCESSOR_URL = ""
-IVA_VACITM1_FIELD = "NOR"
-GEOGRAPHIC_ACTIVITY_VACBPR_FIELD = "CON"
-USER_PROCESSOR_AUTH = ""
-USER_PROCESSOR_PASSWORD = ""
-
-
-INVOICE_HOST_URL = https://www.ilink.pt/ilink-api/api/v1/pt/apps/documents
-INVOICE_HOST_AUTH = ""
-INVOICE_HOST_PASSWORD = ""
diff --git a/wait-for-mysql.sh b/wait-for-mysql.sh
index 49217db..43719c8 100755
--- a/wait-for-mysql.sh
+++ b/wait-for-mysql.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 # wait-for-mysql.sh
 
-until mycli -h $DB_HOST -u $MYSQL_USER -p $MYSQL_PASSWORD -e 'SELECT 1' --myclirc /tmp/.myclirc; do
+until mycli -h $DB_HOST -u nau_user -p nau_password -e 'SELECT 1' --myclirc /tmp/.myclirc; do
   >&2 echo "MySQL is unavailable - sleeping"
   sleep 1
 done