experimental smaller docker image

Dockerfile

@@ -1,23 +1,40 @@
-FROM node:20-alpine
+FROM node:20-alpine AS base
-
-WORKDIR /app
-
-# Required for Prisma on Alpine
 RUN apk add --no-cache openssl
 
-# Install all deps (including devDeps for tsx worker runtime + build tooling)
+# ── deps: install production deps only ───────────────────────────────────────
+FROM base AS deps
+WORKDIR /app
+COPY package*.json ./
+COPY prisma ./prisma
+RUN npm ci --omit=dev && npm run postinstall
+
+# ── build: full install + compile ─────────────────────────────────────────────
+FROM base AS builder
+WORKDIR /app
 COPY package*.json ./
 COPY prisma ./prisma
 RUN npm ci
-
-# Copy source
 COPY . .
-
-# Generate Prisma client and build Next.js (postinstall handles prisma generate)
 RUN npm run build
 
+# ── runner: lean production image ─────────────────────────────────────────────
+FROM base AS runner
+WORKDIR /app
 ENV NODE_ENV=production
+
+# Prisma client + schema (needed at runtime for db push and queries)
+COPY --from=deps /app/node_modules ./node_modules
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/package.json ./package.json
+COPY --from=builder /app/next.config.mjs ./next.config.mjs
+COPY --from=builder /app/prisma ./prisma
+# Worker source (compiled to node_modules/.cache or run via tsx in prod)
+COPY --from=builder /app/src/worker ./src/worker
+COPY --from=builder /app/src/lib ./src/lib
+COPY --from=builder /app/tsconfig.json ./tsconfig.json
+
 EXPOSE 3000
 
-# Default: run web server. Worker container overrides this CMD.
+# Default: web server. Worker container overrides CMD.
 CMD ["npm", "start"]