Multi-stage

Dockerfile

@@ -1,11 +1,10 @@
+FROM python:3.6-slim AS builder
+RUN apt-get update && apt-get install -y gcc
+COPY requirements.txt .
+RUN pip install --user -r requirements.txt
+
 FROM python:3.6-slim
-ENV PYTHONUNBUFFERED 1
-WORKDIR /src
-COPY requirements.txt /src/
-RUN apt-get update && \
-    apt-get install -y gcc && \
-    pip install -r requirements.txt && \
-    apt-get remove -y --auto-remove gcc && \
-    apt-get clean && rm -rf /var/lib/apt/lists/*
-COPY . /src
+COPY --from=builder /root/.local /root/.local
+COPY . .
+ENV PATH=/root/.local/bin:$PATH
 ENTRYPOINT bash -c "python manage.py makemigrations data && python manage.py migrate data && python telegram.py"