Add GitHub action to build and push Docker image

.github/workflows/build.yaml

@@ -0,0 +1,30 @@
+name: Build Docker image
+
+on:
+  push:
+    branches: ['main']
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+
+    steps:
+    - uses: actions/checkout@v5
+    - name: Log in to the Container registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - name: Build and push Docker image
+      id: push
+      uses: docker/build-push-action@v6
+      with:
+        context: docker
+        push: true
+        tags: ghcr.io/${{github.repository}}:latest

docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.7-alpine
+FROM python:3.10-alpine
 
 RUN apk update \
   && apk add --no-cache --virtual .build-deps git g++ postgresql-dev yaml-dev \

requirements.server.txt

@@ -1,5 +1,5 @@
 # These requirements are what you would install on a production server.
 .
-psycopg2==2.8
+psycopg2==2.9.10
 gunicorn==19.9.0
 progressbar2