📦 build(docker): add date-based image tagging

- add automatic date-based tag (YYYY.MM.DD format) for docker images
- improve image versioning and traceability in container registry

Author: pooneyy

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

@@ -41,6 +41,7 @@ jobs:
           owner=$(echo '${{ github.repository_owner }}' | tr '[:upper:]' '[:lower:]')
           echo "OWNER=$owner" >> "$GITHUB_ENV"
           echo "IMAGE_FULL_NAME=ghcr.io/$owner/${{ env.IMAGE_NAME }}" >> $GITHUB_ENV
+          echo "DATE_TAG=$(date +'%Y.%m.%d')" >> $GITHUB_ENV
           echo "IMAGE_TAG=${IMAGE_TAG:-latest}" >> $GITHUB_ENV
 
       - name: Login to GitHub Container Registry
@@ -80,6 +81,7 @@ jobs:
           push: true
           tags: |
             ${{ env.IMAGE_FULL_NAME }}:${{ env.IMAGE_TAG }}
+            ${{ env.IMAGE_FULL_NAME }}:${{ env.DATE_TAG }}
             ${{ github.event.inputs.image_tag != 'latest' && format('{0}:latest', env.IMAGE_FULL_NAME) || '' }}
           cache-from: type=gha
           cache-to: type=gha,mode=max