Refactor Dockerfile and build.yaml to include CREATED_AT in build args and update label formatting

.gitea/workflows/build.yaml

@@ -24,11 +24,6 @@ jobs:
           token: ${{ secrets.GH_TOKEN }}
           path: homebrewery
 
-      - name: Debugging clones
-        run: |
-          ls -la .
-          ls -la homebrewery
-
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v3
         with:
@@ -42,6 +37,10 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Getting build time
+        run: |
+          echo "CREATED_AT=$(date -u --rfc-3339=seconds)" >> "$GITHUB_ENV"
+
       - name: Build and push
         uses: docker/build-push-action@v6
         with:
@@ -50,6 +49,7 @@ jobs:
           build-args: |
             VERSION=${{ github.event.release.tag_name }}
             REVISION=${{ github.sha }}
+            CREATED_AT=$CREATED_AT
           tags: |
             git.morlana.online/${{ github.repository_owner }}/homebrewery:latest
             git.morlana.online/${{ github.repository_owner }}/homebrewery:${{ github.event.release.tag_name }}