fix: implement Lean Docker strategy with mintel/runtime and remove explicit container_name fields

.gitea/workflows/pipeline.yml

@@ -97,7 +97,7 @@ jobs:
         run: |
           echo "${{ secrets.REGISTRY_PASS }}" | docker login registry.infra.mintel.me -u "${{ secrets.REGISTRY_USER }}" --password-stdin
 
-      - name: 🏗️ Build & Push Nextjs Base
+      - name: 🏗️ Build & Push Nextjs Build-Base
         env:
           TAG: ${{ github.ref_name }}
         run: |
@@ -108,6 +108,17 @@ jobs:
             -f packages/infra/docker/Dockerfile.nextjs \
             --push .
 
+      - name: 🏗️ Build & Push Production Runtime
+        env:
+          TAG: ${{ github.ref_name }}
+        run: |
+          docker buildx build \
+            --platform linux/amd64,linux/arm64 \
+            -t registry.infra.mintel.me/mintel/runtime:$TAG \
+            -t registry.infra.mintel.me/mintel/runtime:latest \
+            -f packages/infra/docker/Dockerfile.runtime \
+            --push .
+
       - name: 🏗️ Build & Push Gatekeeper (Product)
         env:
           TAG: ${{ github.ref_name }}