chore: add updater image configuration to Docker workflow

- Introduced a new job for building and pushing an updater Docker image, dynamically setting its name based on the repository structure.
- Updated existing image name configurations for frontend and backend to strip version numbers, ensuring cleaner image tags.
- Enhanced the Docker workflow with steps for checking out the repository, configuring Buildx, and logging into the Gitea registry.

.gitea/workflows/docker.yml

@@ -22,7 +22,8 @@ jobs:
           set -euo pipefail
           owner=$(echo "${{ gitea.repository }}" | cut -d/ -f1 | tr '[:upper:]' '[:lower:]')
           name=$(echo "${{ gitea.repository }}" | cut -d/ -f2 | tr '[:upper:]' '[:lower:]')
-          echo "IMAGE_NAME=${{ env.REGISTRY }}/${owner}/${name}-backend" >> "${GITHUB_ENV}"
+          stem=$(printf '%s' "$name" | sed -E 's/-[0-9]+$//')
+          echo "IMAGE_NAME=${{ env.REGISTRY }}/${owner}/${stem}-backend" >> "${GITHUB_ENV}"
 
       - name: Prepare backend build context
         shell: bash
@@ -81,7 +82,8 @@ jobs:
           set -euo pipefail
           owner=$(echo "${{ gitea.repository }}" | cut -d/ -f1 | tr '[:upper:]' '[:lower:]')
           name=$(echo "${{ gitea.repository }}" | cut -d/ -f2 | tr '[:upper:]' '[:lower:]')
-          echo "IMAGE_NAME=${{ env.REGISTRY }}/${owner}/${name}-frontend" >> "${GITHUB_ENV}"
+          stem=$(printf '%s' "$name" | sed -E 's/-[0-9]+$//')
+          echo "IMAGE_NAME=${{ env.REGISTRY }}/${owner}/${stem}-frontend" >> "${GITHUB_ENV}"
 
       - name: Prepare frontend build context
         shell: bash
@@ -135,6 +137,50 @@ jobs:
             org.opencontainers.image.revision=${{ gitea.sha }}
             org.opencontainers.image.created=${{ gitea.event.head_commit.timestamp }}
 
+  updater-image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Configure updater image name
+        shell: bash
+        run: |
+          set -euo pipefail
+          owner=$(echo "${{ gitea.repository }}" | cut -d/ -f1 | tr '[:upper:]' '[:lower:]')
+          name=$(echo "${{ gitea.repository }}" | cut -d/ -f2 | tr '[:upper:]' '[:lower:]')
+          stem=$(printf '%s' "$name" | sed -E 's/-[0-9]+$//')
+          echo "IMAGE_NAME=${{ env.REGISTRY }}/${owner}/${stem}-updater" >> "${GITHUB_ENV}"
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Gitea Registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.shts.su
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.ACTIONS_PAT }}
+
+      - name: Build and push updater image
+        uses: docker/build-push-action@v5
+        with:
+          context: deploy/updater
+          file: deploy/updater/Dockerfile
+          platforms: linux/amd64
+          push: true
+          tags: |
+            ${{ env.IMAGE_NAME }}:latest
+            ${{ env.IMAGE_NAME }}:${{ gitea.sha }}
+          cache-from: type=gha,scope=updater
+          cache-to: type=gha,mode=max,scope=updater
+          labels: |
+            org.opencontainers.image.title=mmapp-updater
+            org.opencontainers.image.description=MikroTik Manager autonomous Docker updater
+            org.opencontainers.image.version=latest
+            org.opencontainers.image.revision=${{ gitea.sha }}
+            org.opencontainers.image.created=${{ gitea.event.head_commit.timestamp }}
+
   notify-webhook:
     if: ${{ secrets.DEPLOY_WEBHOOK_URL != '' }}
     needs: