chore: add Dockerfile for TanStack Start production build

.dockerignore

@@ -0,0 +1,6 @@
+node_modules
+.output
+.git
+.env*
+.DS_Store
+*.log

.github/workflows/release.yml

@@ -15,22 +15,33 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
         with:
-          fetch-depth: 0
-      - uses: actions/setup-go@v5
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
         with:
-          go-version: 1.22
-          cache: true
-      - uses: ko-build/setup-ko@v0.7
-      - uses: sigstore/cosign-installer@v3.7.0
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
         with:
-          cosign-release: v2.2.3
-      - uses: goreleaser/goreleaser-action@v5
-        with:
-          version: v1.24.0
-          args: release --clean
-        env:
-          GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
-          COSIGN_PASSWORD: '${{ secrets.COSIGN_PASSWORD }}'
-          COSIGN_PRIVATE_KEY: '${{ secrets.COSIGN_PRIVATE_KEY }}'
-          COSIGN_PUBLIC_KEY: '${{ secrets.COSIGN_PUBLIC_KEY }}'
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -0,0 +1,21 @@
+# Stage 1 — deps + build
+FROM oven/bun:1 AS builder
+WORKDIR /app
+
+COPY package.json bun.lock ./
+RUN bun install --frozen-lockfile
+
+COPY . .
+RUN bun run build
+
+# Stage 2 — production runtime
+FROM node:22-alpine AS runner
+WORKDIR /app
+
+COPY --from=builder /app/.output ./.output
+
+EXPOSE 3000
+
+ENV NODE_ENV=production
+
+CMD ["node", ".output/server/index.mjs"]