add docker publish workflow for automated image building and publishing

Author: frefrik

.github/workflows/docker-publish.yml

@@ -0,0 +1,37 @@
+name: Docker Publish
+
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - 'README.md'
+      - '.gitignore'
+      - 'docker-compose.yml'
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    name: Build and push image
+    runs-on: self-hosted
+
+    steps:
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Build and push
+      uses: docker/build-push-action@v6
+      with:
+        push: true
+        tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest