Change order of image layers for efficiency

Dockerfile

@@ -11,10 +11,10 @@ RUN git clone --recurse-submodules https://github.com/azlux/botamusique.git . &&
 FROM ${ARCH}python:3-slim-buster AS python-builder
 ENV DEBIAN_FRONTEND=noninteractive
 WORKDIR /botamusique
-COPY --from=source /botamusique .
 RUN apt-get update \
     && apt-get install -y gcc ffmpeg libjpeg-dev libmagic-dev opus-tools zlib1g-dev \
     && rm -rf /var/lib/apt/lists/*
+COPY --from=source /botamusique .
 RUN python3 -m venv venv \
     && venv/bin/pip install wheel \
     && venv/bin/pip install -r requirements.txt
@@ -40,12 +40,12 @@ FROM ${ARCH}python:3-slim-buster
 ENV DEBIAN_FRONTEND=noninteractive
 EXPOSE 8181
 WORKDIR /botamusique
-COPY --from=python-builder /botamusique .
-COPY --from=node-builder /botamusique/static static
-COPY --from=template-builder /botamusique/templates templates
 RUN apt-get update \
     && apt-get install -y ffmpeg libmagic-dev opus-tools zlib1g \
     && rm -rf /var/lib/apt/lists/*
+COPY --from=python-builder /botamusique .
+COPY --from=node-builder /botamusique/static static
+COPY --from=template-builder /botamusique/templates templates
 RUN chmod +x entrypoint.sh
 ENTRYPOINT [ "/botamusique/entrypoint.sh" ]
 CMD ["/botamusique/venv/bin/python", "/botamusique/mumbleBot.py"]