Optimize the Docker file - fixes #1

Dockerfile

@@ -1,30 +1,44 @@
-FROM webrecorder/browsertrix-crawler:1.0.4
+FROM webrecorder/browsertrix-crawler:1.0.4 AS base
 
-ENV RUNNING_IN_DOCKER=1
-
-WORKDIR /app
-
-RUN pip install --upgrade pip && \
-	pip install pipenv && \
-	add-apt-repository ppa:mozillateam/ppa && \
+RUN add-apt-repository ppa:mozillateam/ppa && \
 	apt-get update && \
-	apt-get install -y gcc ffmpeg fonts-noto exiftool && \
+	apt-get install -y --no-install-recommends gcc ffmpeg fonts-noto exiftool && \
 	apt-get install -y --no-install-recommends firefox-esr && \
 	ln -s /usr/bin/firefox-esr /usr/bin/firefox && \
 	wget https://github.com/mozilla/geckodriver/releases/download/v0.33.0/geckodriver-v0.33.0-linux64.tar.gz && \
 	tar -xvzf geckodriver* -C /usr/local/bin && \
 	chmod +x /usr/local/bin/geckodriver && \
-	rm geckodriver-v*
+	rm geckodriver-v* && \
+    rm -rf /var/lib/apt/lists/*
+
+FROM base AS pipenv
+
+ENV RUNNING_IN_DOCKER=1
+ENV LANG=C.UTF-8
+ENV LC_ALL=C.UTF-8
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONFAULTHANDLER=1
 
+WORKDIR /
 
+RUN pip install pipenv
 COPY Pipfile* ./
+COPY Pipfile.lock .
 # install from pipenv, with browsertrix-only requirements
-RUN pipenv install
+RUN PIPENV_VENV_IN_PROJECT=1 pipenv install --deploy
 
-# doing this at the end helps during development, builds are quick
-COPY ./src/ . 
+FROM base AS runtime
+
+WORKDIR /app
+
+# Copy virtual env built in pipenv stage
+COPY --from=pipenv /.venv /.venv
+ENV PATH="/.venv/bin:$PATH"
 
-ENTRYPOINT ["pipenv", "run", "python3", "-m", "auto_archiver"]
+# doing this at the end helps during development, builds are quick
+COPY ./src/ .
 
+ENTRYPOINT ["python3", "-m", "auto_archiver"]
+CMD ["--config", "secrets/orchestration.yaml"]
 # should be executed with 2 volumes (3 if local_storage is used)
 # docker run --rm -v $PWD/secrets:/app/secrets -v $PWD/local_archive:/app/local_archive aa pipenv run python3 -m auto_archiver --config secrets/orchestration.yaml