add backend

Dockerfile

@@ -1,19 +1,26 @@
+# Shared build: generates /dist (Astro site + admin SPA) and tina/__generated__
 FROM node:20-alpine AS builder
-
 WORKDIR /app
-
-COPY package.json package-lock.json ./
-RUN npm ci
-
+COPY package*.json ./
+RUN npm ci --legacy-peer-deps
 COPY . .
-RUN npm run build
-
-FROM nginx:alpine
+ENV TINA_PUBLIC_IS_LOCAL=true
+RUN npm run build:tina
 
+# Frontend: Nginx serving the static site + TinaCMS admin SPA
+FROM nginx:alpine AS frontend
 RUN rm /etc/nginx/conf.d/default.conf
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 COPY --from=builder /app/dist /usr/share/nginx/html
-
 EXPOSE 80
 
-CMD ["nginx", "-g", "daemon off;"]
+# Backend: TinaCMS self-hosted API server
+FROM node:20-alpine AS backend
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci --legacy-peer-deps --omit=dev
+COPY backend/ ./backend/
+COPY --from=builder /app/tina/__generated__ ./tina/__generated__
+ENV NODE_ENV=production
+EXPOSE 3000
+CMD ["node", "backend/index.js"]