[EXPERIMENT] build on PR and push image on main

.github/workflows/dockerfile-validation.yml

@@ -1,4 +1,4 @@
-name: Dockerfile Validation
+name: Docker Build and Publish
 
 on:
   push:
@@ -13,28 +13,39 @@ on:
       - '.github/workflows/dockerfile-validation.yml'
 
 jobs:
-  validate-dockerfile:
+  docker:
     runs-on: ubuntu-latest
-
+    permissions:
+      contents: read
+      packages: write
+
     steps:
     - name: Checkout code
       uses: actions/checkout@v4
-      
+
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3
-      
+
     - name: Lint Dockerfile
       uses: hadolint/hadolint-action@v3.1.0
       with:
         dockerfile: Dockerfile
         failure-threshold: warning
-
-    - name: Build Docker image
+
+    - name: Log in to GitHub Container Registry
+      if: github.event_name == 'push'
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Build Docker image (PR) / Build and push image (main)
       uses: docker/build-push-action@v5
       with:
         context: .
         file: ./Dockerfile
-        push: false
-        tags: test-build:latest
+        push: ${{ github.event_name == 'push' }}
+        tags: ghcr.io/okteto/deploy-preview:main
         cache-from: type=gha
-        cache-to: type=gha,mode=max
+        cache-to: type=gha,mode=max

action.yml

@@ -31,7 +31,7 @@ inputs:
     required: false
 runs:
   using: "docker"
-  image: "Dockerfile"
+  image: "docker://ghcr.io/okteto/deploy-preview:main"
   args:
     - ${{ inputs.name }}
     - ${{ inputs.timeout }}