Add AI DEV Node deployment foundation

Dockerfile

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+FROM node:22-bookworm-slim AS build
+
+WORKDIR /app
+
+COPY package*.json ./
+COPY frontend/package*.json ./frontend/
+
+RUN npm ci
+RUN npm --prefix frontend ci
+
+COPY tsconfig.json ./
+COPY server ./server
+COPY migrations ./migrations
+COPY frontend ./frontend
+
+RUN npm run build
+
+FROM node:22-bookworm-slim AS runtime
+
+WORKDIR /app
+ENV NODE_ENV=production
+ENV PORT=3000
+
+COPY package*.json ./
+RUN npm ci --omit=dev && npm cache clean --force
+
+COPY --from=build /app/dist ./dist
+COPY --from=build /app/frontend/dist ./frontend/dist
+COPY migrations ./migrations
+
+EXPOSE 3000
+
+CMD ["npm", "run", "start:deploy"]