first draft for Dockerfile

Dockerfile

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+###########
+# Builder #
+###########
+
+# pull official base image
+FROM python:alpine as builder
+
+# update system
+RUN apk update && \
+    apk add git && \
+    apk add rsync && \
+    apk add docker
+
+# set work directory
+WORKDIR /usr/src/app
+
+# set environment variables
+ENV PYTHONDONTWRITEBYTECODE 1
+ENV PYTHONUNBUFFERED 1
+
+# install dependencies
+RUN pip install --upgrade pip
+COPY requirements.txt .
+RUN pip wheel --no-cache-dir --no-deps --wheel-dir /usr/src/app/wheels -r requirements.txt
+
+#########
+# Final #
+#########
+
+# pull official base image
+FROM python:alpine
+
+# create app home
+ENV APP_HOME = /home/app
+RUN mkdir -p $APP_HOME
+WORKDIR $APP_HOME
+
+# install packages from builder
+COPY --from=builder /usr/src/app/wheels /wheels
+COPY --from=builder /usr/src/app/requirements.txt requirements.txt
+RUN pip install --no-cache /wheels/*
+
+# copy in files
+COPY ./code .
+
+# start execution
+ENTRYPOINT [ "python", "main.py" ]