custom bookwyrm build

This bookwyrm build runs periodically, building the latest tag
of Bookwyrm. It also patches settings.py to retain database
connections for a set period of time, instead of creating a new
database connection for each request.

.github/workflows/docker-publish.yml

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+name: Build and Push to Docker Hub
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: '0 */2 * * *'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build_and_push:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Test checkout
+      uses: actions/checkout@v4
+
+    - name: Fetch the latest Bookwyrm release tag
+      id: bookwyrm_release
+      run: |
+        LATEST_RELEASE=$(curl -s https://api.github.com/repos/bookwyrm-social/bookwyrm/releases/latest | jq -r .tag_name)
+        echo "Latest release tag is $LATEST_RELEASE"
+        echo "::set-output name=tag::$LATEST_RELEASE"
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Check out Bookwyrm repository at the latest tag
+      uses: actions/checkout@v4
+      with:
+        repository: bookwyrm-social/bookwyrm
+        ref: ${{ steps.bookwyrm_release.outputs.tag }}
+        path: "bookwyrm"
+
+    - name: Copy our Dockerfile into Bookwyrm context
+      run: cp Dockerfile bookwyrm/Dockerfile
+
+    - name: Have database connections open for an hour, instead of opening a new one for each request.
+      run: |
+        echo 'CONN_MAX_AGE=3600' >> bookwyrm/bookwyrm/settings.py
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log in to Docker Hub
+      uses: docker/login-action@v3
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+    - name: Build and Push
+      uses: docker/build-push-action@v5
+      with:
+        context: ./bookwyrm
+        file: ./bookwyrm/Dockerfile
+        push: true
+        tags: jrasanen/bookwyrm:${{ steps.bookwyrm_release.outputs.tag }}
+        platforms: linux/amd64,linux/arm64

Dockerfile

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+FROM python:3.9
+
+ENV PYTHONUNBUFFERED 1
+
+RUN mkdir /app /app/static /app/images
+
+WORKDIR /app
+
+COPY requirements.txt /app/
+RUN pip install -r requirements.txt --no-cache-dir
+
+COPY . /app
+
+CMD ["gunicorn", "bookwyrm.wsgi:application", "--bind", "0.0.0.0:8000", "--workers", "3"]