Improve build speed

app/Dockerfile

@@ -1,4 +1,5 @@
-FROM alpine:3.9.6
+ARG PYTHON_VERSION="3.8.6"
+FROM python:${PYTHON_VERSION}-slim-buster
 
 CMD ["python3"]
 
@@ -9,8 +10,13 @@ ENV PYTHONUNBUFFERED 1
 
 COPY . /app/
 
-RUN apk add -U --no-cache bash python3 python3-dev libpq postgresql-dev unixodbc-dev musl-dev g++ libffi-dev \
-  && pip3 install --upgrade --no-cache-dir pip setuptools \
-  && pip3 install --no-cache-dir -r requirements.txt \
-  && ln -s /usr/bin/python3 /usr/bin/python \
-  && apk del --no-cache python3-dev postgresql-dev unixodbc-dev musl-dev g++ libffi-dev
+# hadolint ignore=DL3013
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+    netcat=1.10-41.1 \
+    libpq-dev=11.9-0+deb10u1 \
+    unixodbc-dev=2.3.6-0.1 \
+    g++=4:8.3.0-1 \
+ && pip install --no-cache-dir -U pip setuptools \
+ && pip install --no-cache-dir -r requirements.txt \
+ && apt-get clean

docker-compose.prod.yml

@@ -23,10 +23,9 @@ services:
     build: ./frontend
     environment:
       API_URL: "http://backend:8000"
+      GOOGLE_TRACKING_ID: ""
     volumes:
       - www:/app/dist
-    environment:
-      GOOGLE_TRACKING_ID: ""
 
   nginx:
     build: ./nginx