feat(deploy): Dockerfile multi-stage Node 20-alpine pour Coolify

Build stage : npm ci + npm run build (inclut prebuild carte-o.js).
Runtime : node:20-alpine, dist/ + node_modules copiees, EXPOSE 3000, HOST/PORT env.
Start command Coolify : node ./dist/server/entry.mjs

Dockerfile

@@ -0,0 +1,16 @@
+FROM node:20-alpine AS builder
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM node:20-alpine
+WORKDIR /app
+COPY --from=builder /app/dist ./dist
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/package*.json ./
+EXPOSE 3000
+ENV HOST=0.0.0.0
+ENV PORT=3000
+CMD ["node", "./dist/server/entry.mjs"]