migrate to python 3.11

.github/workflows/pylint.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7"]
+        python-version: ["3.11"]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}

.github/workflows/test-backend.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7]
+        python-version: [3.11]
     defaults:
       run:
         working-directory: ./backend

Dockerfile

@@ -5,14 +5,14 @@ RUN npm install
 RUN npm run build
 # now we should have a dist folder containing the static website
 
-FROM python:3.7.10-stretch as pybuilder
+FROM python:3.11.1-bullseye as pybuilder
 WORKDIR /code
 COPY ./backend /code/
 RUN pip install --user -r requirements.txt
 # We get the dependencies with the full python image so we can compile the one with missing binaries
 ENV UseRobots=false
 
-FROM python:3.7.10-slim-stretch as app
+FROM python:3.11.1-slim-bullseye as app
 # copy the dependencies from the pybuilder
 COPY --from=pybuilder /root/.local /root/.local
 # copy the backend python files from the pybuilder