Optimize Dockerfile with multi-stage build

Dockerfile

@@ -1,15 +1,29 @@
-FROM node:lts-alpine
-
-WORKDIR /app
+FROM node:lts-alpine AS build
 
 RUN apk add --no-cache openssl
 
+WORKDIR /app
+
 # Copy only package files and install deps
 # This layer will be cached as long as package*.json don't change
 COPY package*.json package-lock.json* ./
-RUN npm ci
+RUN --mount=type=cache,target=/root/.npm npm ci --omit=dev
 
-# Copy the rest of the source
+# Copy the rest of your source
 COPY . .
 
+# Pre-generate prisma client
+RUN node_modules/.bin/prisma generate
+
+FROM node:lts-alpine
+
+RUN apk add --no-cache openssl
+
+USER node:node
+
+WORKDIR /app
+
+COPY --from=build --chown=node:node /app .
+
+
 EXPOSE 8080