docker update

Dockerfile

-FROM gricad-registry.univ-grenoble-alpes.fr/osug/resif/resif_docker/obspy:1.2.1-python-3.8-slim
-MAINTAINER RESIF DC <resif-dc@univ-grenoble-alpes.fr>
+# Building heavy python dependencies as a first stage
+# will build ospy for instance
+FROM python:3.9-slim AS python-deps
+RUN apt-get update && apt-get install -y --no-install-recommends gcc libc6-dev
 COPY requirements.txt /
 RUN pip install --no-cache-dir -r /requirements.txt
+
+
+FROM python:3.9-slim
+MAINTAINER RESIF DC <resif-dc@univ-grenoble-alpes.fr>
+# Get the dependencies from previous stage
+COPY --from=python-deps /usr/local/lib/python3.9/site-packages /usr/local/lib/python3.9/site-packages
 RUN pip install --no-cache-dir gunicorn
 RUN mkdir -p /usr/share/man/man1
 RUN apt-get update && apt-get install -y wget openjdk-11-jre-headless && apt-get clean
@@ -11,6 +19,7 @@ COPY start_resp.py start_sacpz.py ./
 COPY apps ./apps/
 COPY templates ./templates/
 COPY static ./static/
+USER 1000
 
 ENTRYPOINT ["gunicorn",  "--bind",  "0.0.0.0:8000"]
 CMD ["start_sacpz:app"]

requirements.txt

-Flask==1.1.2
+Flask==2.0.1
 obspy==1.2.2