Some minor but necessary workflow improvements

.github/workflows/build_and_test.yml

@@ -1,14 +1,21 @@
 name: Build, Run and Test Docker Image
 
-on: [push]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 jobs:
   build-test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # 4.1.7
+      - name: Checkout
+        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
 
-      - name: Setup .netrc
+      - name: Setup nexus authentication
         run: |
           echo "machine nexus.alfresco.com" >> ~/.netrc
           echo "login ${{ secrets.NEXUS_USERNAME }}" >> ~/.netrc
@@ -19,13 +26,13 @@ jobs:
         working-directory: ${{ github.workspace }}
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@5927c834f5b4fdf503fca6f4c7eccda82949e1ee # 3.1.0
+        uses: docker/setup-qemu-action@5927c834f5b4fdf503fca6f4c7eccda82949e1ee # v3.1.0
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@2ad185228a349d19414702819e06df9fa4314287 # 3.4.0
+        uses: docker/setup-buildx-action@2ad185228a349d19414702819e06df9fa4314287 # v3.4.0
 
-      - name: Login to Docker Hub
-        uses: docker/login-action@0d4c9c5ea7693da7b068278f7b52bda2a190a446 # 3.2.0
+      - name: Login to Quay.io
+        uses: docker/login-action@0d4c9c5ea7693da7b068278f7b52bda2a190a446 # v3.2.0
         with:
           registry: quay.io
           username: ${{ secrets.QUAY_USERNAME }}
@@ -34,17 +41,17 @@ jobs:
       - name: Bake Docker images
         uses: docker/bake-action@eac74531aa56a9266bfedfe5edb6b851ce2cca2b  # v5.4.0
 
-      - name: Show all images
+      - name: Show all built images
         run: docker images
 
-      - name: Docker save the images produced by the bake action with the name consisting alfresco
+      - name: Docker save all baked images whose name include `alfresco`
         run: |
           docker save -o /tmp/alfresco-docker-images.tar $(docker images --format "{{.Repository}}:{{.Tag}}" | grep alfresco)
 
-      - name: Upload image as a tar for next job
-        uses: actions/upload-artifact@0b2256b8c012f0828dc542b3febcab082c67f72b # 4.3.4
+      - name: Upload images as artifact
+        uses: actions/upload-artifact@0b2256b8c012f0828dc542b3febcab082c67f72b # v4.3.4
         with:
-          name: ${{ github.run_number }}
+          name: docker-images
           path: /tmp/alfresco-docker-images.tar
 
   compose-test:
@@ -56,13 +63,13 @@ jobs:
         docker-compose-file: [docker-compose.yml, docker-compose-components.yml]
     steps:
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@2ad185228a349d19414702819e06df9fa4314287  # 3.4.0      
+        uses: docker/setup-buildx-action@2ad185228a349d19414702819e06df9fa4314287  # v3.4.0
 
       - name: Download artifacts
-        uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # 4.1.8
+        uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
         with:
           path: /tmp
-          name: "${{ github.run_number }}"
+          name: docker-images
 
       - name: Load Docker images
         run: |