Add docker build-push gh action

.github/workflows/docker-build.yml

@@ -0,0 +1,57 @@
+name: Docker build and push
+
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    tags:
+      - '**'
+
+jobs:
+  build-push:
+    runs-on: ubuntu-latest
+    steps:
+      # - name: Maximize build disk space
+      #   uses: easimon/maximize-build-space@v10
+      #   with:
+      #     remove-dotnet:        true
+      #     remove-android:       true
+      #     remove-haskell:       true
+      #     remove-codeql:        true
+      #     remove-docker-images: true
+
+      - name: Resize /dev/shm
+        run: |
+          sudo mount -o remount,size=4G /dev/shm
+
+      - name: Mount /var as tmpfs
+        run: |
+          sudo mount -t tmpfs -o size=30G tmpfs /var/lib/docker
+
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{github.actor}}
+          password: ${{secrets.GITHUB_TOKEN}}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Extract app's version from info.xml
+        id: getversion
+        uses: mavrosxristoforos/[email protected]
+        with:
+          xml-file: 'appinfo/info.xml'
+          xpath: '/info/version'
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ghcr.io/nextcloud/context_chat_backend:latest,ghcr.io/nextcloud/context_chat_backend:${{ steps.getversion.outputs.info }}

.github/workflows/max-space.yml

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+name: My build action requiring more space
+
+on: workflow_dispatch
+
+jobs:
+  build:
+    name: Build my artifact
+    runs-on: ubuntu-latest
+    steps:
+      - name: Free space before
+        run: |
+          echo "Free space before:"
+          df -h
+
+      - name: Maximize build disk space
+        uses: easimon/maximize-build-space@v10
+        with:
+          # need space in /var for Docker images
+          root-reserve-mb:      30000
+          remove-dotnet:        true
+          remove-android:       true
+          remove-haskell:       true
+          remove-codeql:        true
+          remove-docker-images: true
+
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Free space after
+        run: |
+          echo "Free space after:"
+          df -h