Dockerfile: Switch base image: python/3.11-alpine

psycopg2-binary stopped shipping for 3.6 and 3.7, so using RH's
ubi8/ubi-minimal wasn't going to work anymore. ubi8/python-39 seemed
promising, but it turns out that the UBI Python images don't allow
package installs.

Alpine is smaller, faster and more straightforward.

Signed-off-by: Zack Cerza <[email protected]>

Dockerfile

@@ -1,14 +1,8 @@
-FROM registry.access.redhat.com/ubi8/ubi-minimal:latest
+FROM python:3.11-alpine
 EXPOSE 8080
-RUN microdnf update -y && \
-  microdnf install -y \
-	curl \
-	lsof \
-	python3 \
-	python3-pip \
-	python3-setuptools \
-	python3-wheel \
-	tzdata
+ENV TZ="UTC"
+RUN apk add curl tzdata && \
+  pip install -U pip
 
 # Install dependencies:
 COPY requirements.txt .
@@ -21,4 +15,4 @@ COPY config.py.in /paddles/config.py
 COPY alembic.ini.in /paddles/alembic.ini
 COPY container_start.sh /paddles/container_start.sh
 WORKDIR /paddles
-CMD bash container_start.sh
+CMD sh container_start.sh

container_start.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 set -ex
 trap exit TERM
 pecan populate config.py