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app.js

@@ -5,7 +5,7 @@ const db = require('./db');
 const sharks = require('./routes/sharks');
 
 const path = __dirname + '/views/';
-const port = 8080;
+const port = process.env.PORT || 9455;
 
 app.engine('html', require('ejs').renderFile);
 app.set('view engine', 'html');
@@ -14,5 +14,5 @@ app.use(express.static(path));
 app.use('/sharks', sharks);
 
 app.listen(port, function () {
-  console.log('Example app listening on port 8080!')
+  console.log(`Example app listening on port ${port}!`);
 })

db.js

@@ -1,11 +1,25 @@
 const mongoose = require('mongoose');
 
-const MONGO_USERNAME = 'sammy';
-const MONGO_PASSWORD = 'password';
-const MONGO_HOSTNAME = '127.0.0.1';
-const MONGO_PORT = '27017';
-const MONGO_DB = 'sharkinfo';
+const {
+    MONGO_USERNAME,
+    MONGO_PASSWORD,
+    MONGO_HOSTNAME,
+    MONGO_PORT,
+    MONGO_DB
+}= process.env;
 
 const url = `mongodb://${MONGO_USERNAME}:${MONGO_PASSWORD}@${MONGO_HOSTNAME}:${MONGO_PORT}/${MONGO_DB}?authSource=admin`;
 
-mongoose.connect(url, {useNewUrlParser: true});
+const options = {
+  reconnectTries: Number.MAX_VALUE,
+  reconnectInterval: 500, 
+  connectTimeoutMS: 10000,
+};
+
+mongoose.connect(url, options).then(function () {
+    console.log('MongoDB is connected');
+}
+).catch(function (err) {
+    console.log(err);
+}
+);

docker-compose.yml

@@ -0,0 +1,46 @@
+version: '3'
+
+services:
+  nodejs:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: nodejs
+    container_name: nodejs
+    restart: unless-stopped
+    env_file: .env
+    environment:
+      - MONGO_USERNAME=$MONGO_USERNAME
+      - MONGO_PASSWORD=$MONGO_PASSWORD
+      - MONGO_HOSTNAME=db
+      - MONGO_PORT=$MONGO_PORT
+      - MONGO_DB=$MONGO_DB
+    ports:
+      - "9455"
+    volumes:
+      - .:/home/node/app
+      - node_modules:/home/node/app/node_modules
+    networks:
+      - app-network
+    command: ./wait-for.sh db:2701 -- /home/node/app/node_modules/.bin/nodemon app.js 
+
+  db:
+    image: mongo:4.1.8-xenial
+    container_name: db
+    restart: unless-stopped
+    env_file: .env
+    environment:
+      - MONGO_INITDB_ROOT_USERNAME=$MONGO_USERNAME
+      - MONGO_INITDB_ROOT_PASSWORD=$MONGO_PASSWORD
+    volumes:     
+      - dbdata:/data/db
+    networks:
+      - app-network  
+
+networks:
+  app-network:
+    driver: bridge
+
+volumes:
+  dbdata:
+  node_modules: