Dockerfile

# Single-image build: compiles the engine, web SPA, and game server, then runs
# the Fastify server which serves the API, WebSocket, and the built SPA.
# Targets Cloud Run (listens on $PORT, host 0.0.0.0).

# ── Build ─────────────────────────────────────────────────────────────────────
FROM node:22-slim AS build
WORKDIR /app

# Install deps using the lockfile and the workspace package manifests.
COPY package.json package-lock.json ./
COPY packages/engine/package.json packages/engine/package.json
COPY packages/protocol/package.json packages/protocol/package.json
COPY packages/server/package.json packages/server/package.json
COPY packages/web/package.json packages/web/package.json
RUN npm ci

COPY . .
RUN npm run build --workspace @ai-dm/engine \
 && npm run build --workspace @ai-dm/web \
 && npm run build --workspace @ai-dm/server

# Drop dev dependencies for the runtime image.
RUN npm prune --omit=dev

# ── Runtime ───────────────────────────────────────────────────────────────────
FROM node:22-slim AS run
WORKDIR /app
ENV NODE_ENV=production
ENV WEB_DIST=/app/packages/web/dist
ENV DATA_DIR=/data
# Cloud Run injects PORT (defaults to 8080); the server reads process.env.PORT.

COPY --from=build /app/package.json /app/package-lock.json ./
COPY --from=build /app/node_modules ./node_modules
# Workspace packages (node_modules symlinks resolve into these).
COPY --from=build /app/packages/engine/package.json ./packages/engine/package.json
COPY --from=build /app/packages/engine/dist ./packages/engine/dist
COPY --from=build /app/packages/protocol ./packages/protocol
COPY --from=build /app/packages/server/package.json ./packages/server/package.json
COPY --from=build /app/packages/server/dist ./packages/server/dist
COPY --from=build /app/packages/web/dist ./packages/web/dist

EXPOSE 8080
CMD ["node", "packages/server/dist/index.js"]