Use Alpine as root image

app/Dockerfile

@@ -1,20 +1,16 @@
-FROM python:3.6
+FROM alpine:3.9.6
+
+CMD ["python3"]
 
-# set work directory
 WORKDIR /app
 
-# set environment variables
 ENV PYTHONDONTWRITEBYTECODE 1
 ENV PYTHONUNBUFFERED 1
 
-# install psycopg2 dependencies
-RUN apt-get update \
-    && apt-get install --no-install-recommends -y python3-dev libpq-dev unixodbc-dev
+COPY . /app/
 
-# install dependencies
-RUN pip install --upgrade pip setuptools
-COPY ./requirements.txt /app/requirements.txt
-RUN pip install --no-cache-dir -r requirements.txt
+RUN apk add -U python3 python3-dev libpq postgresql-dev unixodbc-dev musl-dev g++ libffi-dev \
+  && pip3 install --upgrade pip setuptools \
+  && pip3 install --no-cache-dir -r requirements.txt \
+  && apk del python3-dev postgresql-dev unixodbc-dev musl-dev g++ libffi-dev
 
-# copy project
-COPY . /app/

frontend/Dockerfile

@@ -1,14 +1,11 @@
-FROM node:13.2.0
+FROM node:13.2-alpine
 
-# set work directory
 WORKDIR /app
 
-# copy project
 COPY . /app/
 
-# install dependencies
-RUN npm install -g npm@latest
-RUN npm install
-
-# build project
-RUN npm run build
+RUN apk add -U git python3 make g++ \
+  && npm install -g npm@latest \
+  && npm install \
+  && npm run build \
+  && apk del git make g++