fix: docker workflow

.github/workflows/docker.yml

@@ -0,0 +1,31 @@
+name: 📦 Docker Image Build & Push
+
+on:
+  push:
+    branches:
+      - "**"
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    name: Build and push Docker image
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Inject enhanced GitHub environment variables
+        uses: rlespinasse/github-slug-action@v5
+      - name: Login to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: |
+            ghcr.io/${{ env.GITHUB_REPOSITORY_OWNER_PART_SLUG }}/albert-docs:${{ env.GITHUB_REF_SLUG }}
+            ${{ github.ref_name == 'main' && format('ghcr.io/{0}/albert-docs:latest', env.GITHUB_REPOSITORY_OWNER_PART_SLUG) || '' }}
+          cache-from: type=registry,ref=ghcr.io/${{ env.GITHUB_REPOSITORY_OWNER_PART_SLUG }}/albert-docs:${{ env.GITHUB_REF_SLUG }}
+          cache-to: type=inline