Merge pull request #17 from hartwork/docker-build-ci

Make GitHub Actions cover `docker compose build`

Author: hartwork

.github/workflows/docker_build.yml

@@ -0,0 +1,27 @@
+# Copyright (c) 2024 Sebastian Pipping <sebastian@pipping.org>
+# Licensed under GNU Affero GPL v3 or later
+
+name: Build docker image
+
+# Drop permissions to minimum for security
+permissions:
+  contents: read
+
+on:
+  pull_request:
+  push:
+  schedule:
+    - cron: '0 16 * * 5'  # Every Friday 4pm
+  workflow_dispatch:
+
+jobs:
+  docker_build:
+    name: Build docker image
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
+    - name: Build docker image
+      run: |
+        set -x
+        docker compose --version
+        docker compose build