add new workflow to build and publish Docker images

.github/workflows/build_docker_images.yml

@@ -0,0 +1,40 @@
+name: Build Docker Images
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build_docker_image:
+    runs-on: ubuntu-22.04
+    strategy:
+      fail-fast: false
+      matrix:
+        docker:
+          - {type: "php", tag: "php-only"}
+          - {type: "swoole", tag: "swoole-enabled"}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push Docker image deminy/counit:${{ matrix.docker.tag }}
+        uses: docker/build-push-action@v5
+        with:
+          context: ./dockerfiles/${{ matrix.docker.type }}
+          platforms: linux/amd64,linux/arm64,linux/arm/v6,linux/arm/v7
+          push: true
+          tags: deminy/counit:${{ matrix.docker.tag }}

dockerfiles/php/Dockerfile

@@ -8,6 +8,6 @@ RUN set -ex \
     docker-php-ext-enable redis && \
     docker-php-ext-install mysqli pdo_mysql && \
     apk del .build-deps && \
-    rm -rf /var/cache/apk/* /tmp/*
+    rm -rf /var/cache/apk/*
 
 WORKDIR "/var/www/"

dockerfiles/swoole/Dockerfile

@@ -8,4 +8,4 @@ RUN set -ex \
     docker-php-ext-enable redis && \
     docker-php-ext-install mysqli pdo_mysql && \
     apk del .build-deps && \
-    rm -rf /var/cache/apk/* /tmp/*
+    rm -rf /var/cache/apk/*