ops(docker): publish Claw3D images from main.

Add a GHCR publishing workflow and expose a health endpoint so Fly deployments can build and pass runtime health checks.

Made-with: Cursor

.github/workflows/docker-publish.yml

@@ -0,0 +1,66 @@
+name: Docker Publish
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "v*"
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ghcr.io/${{ github.repository_owner }}/claw3d
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout
+        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:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Prepare Docker tags
+        id: tags
+        shell: bash
+        run: |
+          set -euo pipefail
+          tags=()
+          if [[ "${GITHUB_REF}" == "refs/heads/main" ]]; then
+            tags+=("${IMAGE_NAME}:main")
+          fi
+          if [[ "${GITHUB_REF}" == refs/tags/v* ]]; then
+            version="${GITHUB_REF#refs/tags/v}"
+            tags+=("${IMAGE_NAME}:${version}")
+            tags+=("${IMAGE_NAME}:latest")
+          fi
+          if [[ ${#tags[@]} -eq 0 ]]; then
+            tags+=("${IMAGE_NAME}:manual")
+          fi
+          {
+            echo "value<<EOF"
+            printf "%s\n" "${tags[@]}"
+            echo "EOF"
+          } >> "$GITHUB_OUTPUT"
+
+      - name: Build and push image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ steps.tags.outputs.value }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

src/app/api/health/route.ts

@@ -0,0 +1,17 @@
+import { NextResponse } from "next/server";
+
+export const runtime = "nodejs";
+
+export async function GET() {
+  return NextResponse.json(
+    {
+      ok: true,
+      service: "claw3d",
+    },
+    {
+      headers: {
+        "Cache-Control": "no-store",
+      },
+    },
+  );
+}