.github/workflows: added GitHub action script to build Alpine docker

.github/workflows/alpine.yml

@@ -3,17 +3,14 @@ name: alpine docker image
 on:
   push:
     branches:
-      - master
+    - master
     tags:
-      - '5.6.*'
-      - '5.5.*'
-  # Allows you to run this workflow manually from the Actions tab
-  workflow_dispatch:
-permissions:
-  contents: read # to fetch code (actions/checkout)
+    - '5.6.*'
+    - '5.7.*'
 
 # This environments for backward compatability with build script for DockerHub
 env:
+  IMAGE_NAME: kamailio-ci
   DOCKER_REPO: kamailio/kamailio-ci
   SOURCE_BRANCH: ${{ github.ref_name }}
 
@@ -22,26 +19,65 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
+
+    - name: Login to GitHub Container Registry
+      if: ${{ env.GITHUB_BASE_REF == '' }}
+      uses: docker/login-action@v2
+      with:
+        registry: ghcr.io
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
     - name: Compile Kamailio source
       run: |
         git submodule init
         git submodule update
         cd `pwd`/pkg/docker/alpine
         ./hooks/pre_build || true
+
     - name: Build the Docker images
       run: |
         cd `pwd`/pkg/docker/alpine
         sudo chown -R ${USER}:${USER} `pwd`
         ./hooks/build
-    - name: Login to Docker Hub
-      if: ${{ env.GITHUB_BASE_REF == '' }}
-      uses: docker/login-action@v2
+
+    - name: Docker meta
+      id: meta
+      uses: docker/metadata-action@v4
       with:
-        username: ${{ secrets.DOCKERHUB_USERNAME }}
-        password: ${{ secrets.DOCKERHUB_TOKEN }}
-    - name: Push images to DockerHub
-      if: ${{ env.GITHUB_BASE_REF == '' }}
-      run: |
-        cd `pwd`/pkg/docker/alpine
-        ./hooks/push
-        ./hooks/post_push
+        # list of Docker images to use as base name for tags
+        images: |
+          ghcr.io/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}
+        # generate Docker tags based on the following events/attributes
+        tags: |
+          type=semver,pattern={{version}}
+          type=semver,pattern={{major}}.{{minor}}
+          type=semver,pattern={{major}}
+          type=ref,event=branch
+
+    - name: Build and push minimal
+      uses: docker/build-push-action@v4
+      with:
+        context: pkg/docker/alpine
+        file: Dockerfile
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+
+    - name: Build and push with apk
+      uses: docker/build-push-action@v4
+      with:
+        context: pkg/docker/alpine
+        file: Dockerfile.alpine
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+
+    - name: Build and push with debug
+      uses: docker/build-push-action@v4
+      with:
+        context: pkg/docker/alpine
+        file: Dockerfile.debug
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}