add build

.gitea/workflows/build.yaml

@@ -17,6 +17,17 @@ jobs:
           username: ${{ vars.CONTAINER_REGISTRY_USERNAME }}
           password: ${{ secrets.CONTAINER_REGISTRY_PASSWORD }}
 
+      - name: Restore stage0 cache
+        uses: actions/cache@v4
+        with:
+          path: fetch/core/stage0
+          key: stage0-${{ hashFiles('packages/core/stage0/package.toml') }}
+      - name: Build stage0
+        env:
+          CONTAINER_REGISTRY: ${{ vars.CONTAINER_REGISTRY }}
+        run: |
+          make registry-bootstrap-stage0 PLATFORM=linux/amd64 REGISTRY_USERNAME=$CONTAINER_REGISTRY/okami101/stagex
+
       - name: Restore stage3 cache
         uses: actions/cache/restore@v4
         with: