Switch to github actions

Author: jbuncle

.github/workflows/docker-build-push.yml

@@ -0,0 +1,70 @@
+# File: .github/workflows/docker-build-push.yml
+name: Build and Push PHP Docker Image
+
+# Trigger on pushes to master (branch) and on all Git tags
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - '*'
+
+# Shared environment variables
+env:
+  PHP_VERSION: '8.3'
+  DOCKER_REPO: 'cyberpearuk/php-build-docker'
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      # 1) Check out your code so Docker can see the Dockerfile, context, etc.
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      # 2) Set up Buildx (needed for docker/build-push-action)
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      # 3) Log in to Docker Hub (uses your repo secrets)
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          registry: docker.io
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      # 4a) If this is a push to main → build & push two tags:
+      #       • $DOCKER_REPO:$PHP_VERSION
+      #       • $DOCKER_REPO:latest
+      - name: Build & push (main branch)
+        if: github.ref == 'refs/heads/master'
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          builder: default
+          platforms: linux/amd64
+          build-args: |
+            PHPVERSION=${{ env.PHP_VERSION }}
+          push: true
+          tags: |
+            ${{ env.DOCKER_REPO }}:${{ env.PHP_VERSION }}
+            ${{ env.DOCKER_REPO }}:latest
+
+      # 4b) If this is a push of a Git tag (e.g. v1.2.3) → build & push two tags:
+      #       • $DOCKER_REPO:<tag>-$PHP_VERSION
+      #       • $DOCKER_REPO:<tag>
+      - name: Build & push (Git tag)
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          builder: default
+          platforms: linux/amd64
+          build-args: |
+            PHPVERSION=${{ env.PHP_VERSION }}
+          push: true
+          tags: |
+            ${{ env.DOCKER_REPO }}:${{ github.ref_name }}-${{ env.PHP_VERSION }}
+            ${{ env.DOCKER_REPO }}:${{ github.ref_name }}