initial version

.github/workflows/docker.yml

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+name: docker-build
+
+on:
+  push:
+    branches:
+      - 'master'
+      - 'main'
+  repository_dispatch:
+    types: [ build ]
+
+jobs:
+  docker:
+    runs-on: ubuntu-20.04
+
+    strategy:
+      fail-fast: false
+      matrix:
+        php-versions: ['7.3', '7.4', '8.0', '8.1']
+
+    steps:
+      - name: Checkout patch files
+        uses: actions/checkout@v2
+      - name: Checkout base dockerfiles
+        uses: actions/checkout@v2
+        with:
+          path: php
+          repository: docker-library/php
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Patch dockerfiles
+        run: |
+          patch -N -p1 -d php < debug.patch
+          patch -N -p1 -d php < version.patch
+          cd php; ./apply-templates.sh
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          context: php/${{ matrix.php-versions }}/bullseye/fpm
+          push: true
+          tags: icewind1991/php-dbg:${{ matrix.php-versions }}