⚡️(CI) optimize Docker Hub workflow

We use the Docker Hub Workflow to build and push
our images to Docker Hub, but to check if we
have vulnerabilities in our images as well.
When we are just checking for vulnerabilities,
we don't need to do all the builing steps.
This commit optimizes the workflow by only doing the
necessary steps when we are just checking for
vulnerabilities, so during pull requests
without label "preview" we skip the build steps,
and we do not activate QEMU.

.github/workflows/docker-hub.yml

@@ -11,10 +11,10 @@ on:
   pull_request:
     branches:
       - "main"
-      - "ci/trivy-fails"
 
 env:
   DOCKER_USER: 1001:127
+  SHOULD_PUSH: ${{ github.event_name != 'pull_request' || contains(github.event.pull_request.labels.*.name, 'preview') }}
 
 permissions:
   contents: read
@@ -26,8 +26,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Set up QEMU
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/setup-buildx-action@v3
       - name: Docker meta
         id: meta
@@ -35,7 +37,7 @@ jobs:
         with:
           images: lasuite/impress-backend
       - name: Login to DockerHub
-        if: github.event_name != 'pull_request' || contains(github.event.pull_request.labels.*.name, 'preview')
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKER_HUB_USER }}
@@ -47,13 +49,14 @@ jobs:
           docker-image-name: "docker.io/lasuite/impress-backend:${{ github.sha }}"
           trivyignores: ./.github/.trivyignore
       - name: Build and push
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/build-push-action@v6
         with:
           context: .
           target: backend-production
           platforms: linux/amd64,linux/arm64
           build-args: DOCKER_USER=${{ env.DOCKER_USER }}
-          push: ${{ github.event_name != 'pull_request' || contains(github.event.pull_request.labels.*.name, 'preview') }}
+          push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
       - name: Cleanup Docker after build
@@ -68,8 +71,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Set up QEMU
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/setup-buildx-action@v3
       - name: Docker meta
         id: meta
@@ -77,7 +82,7 @@ jobs:
         with:
           images: lasuite/impress-frontend
       - name: Login to DockerHub
-        if: github.event_name != 'pull_request' || contains(github.event.pull_request.labels.*.name, 'preview')
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKER_HUB_USER }}
@@ -89,6 +94,7 @@ jobs:
           docker-image-name: "docker.io/lasuite/impress-frontend:${{ github.sha }}"
           trivyignores: ./.github/.trivyignore
       - name: Build and push
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/build-push-action@v6
         with:
           context: .
@@ -98,7 +104,7 @@ jobs:
           build-args: |
             DOCKER_USER=${{ env.DOCKER_USER }}
             PUBLISH_AS_MIT=false
-          push: ${{ github.event_name != 'pull_request' || contains(github.event.pull_request.labels.*.name, 'preview') }}
+          push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
       - name: Cleanup Docker after build
@@ -113,8 +119,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Set up QEMU
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/setup-buildx-action@v3
       - name: Docker meta
         id: meta
@@ -122,7 +130,7 @@ jobs:
         with:
           images: lasuite/impress-y-provider
       - name: Login to DockerHub
-        if: github.event_name != 'pull_request' || contains(github.event.pull_request.labels.*.name, 'preview')
+        if: env.SHOULD_PUSH == 'true'
         run: echo "${{ secrets.DOCKER_HUB_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_HUB_USER }}" --password-stdin
       - name: Run trivy scan
         uses: numerique-gouv/action-trivy-cache@main
@@ -131,6 +139,7 @@ jobs:
           docker-image-name: "docker.io/lasuite/impress-y-provider:${{ github.sha }}"
           trivyignores: ./.github/.trivyignore
       - name: Build and push
+        if: env.SHOULD_PUSH == 'true'
         uses: docker/build-push-action@v6
         with:
           context: .
@@ -138,7 +147,7 @@ jobs:
           target: y-provider
           platforms: linux/amd64,linux/arm64
           build-args: DOCKER_USER=${{ env.DOCKER_USER }}:-1000
-          push: ${{ github.event_name != 'pull_request' || contains(github.event.pull_request.labels.*.name, 'preview') }}
+          push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
       - name: Cleanup Docker after build