feat: optimize prisma binary targets and transition docker base to no…

.dockerignore

@@ -0,0 +1,13 @@
+node_modules
+coverage
+dist
+.env
+.DS_Store
+.git
+.gitignore
+Dockerfile
+docker-compose.yml
+test
+.vscode
+npm-debug.log
+*.md

Dockerfile

@@ -1,5 +1,5 @@
 # Use Node LTS
-FROM node:20-alpine
+FROM node:20-alpine AS builder
 
 # Set working directory
 WORKDIR /app
@@ -8,15 +8,25 @@ WORKDIR /app
 COPY package*.json ./
 RUN npm install
 
-# Copy project
+# Copy project sources and generate Prisma client
 COPY . .
-
-# Generate Prisma client
 RUN npx prisma generate
 
 # Build app
 RUN npm run build
 
+# Keep only production dependencies
+RUN npm prune --production
+
+FROM node:20-alpine AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+
+COPY package*.json ./
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/dist ./dist
+COPY --from=builder /app/src/generated ./src/generated
+
 # Expose port
 EXPOSE 3000
 

package.json

@@ -5,6 +5,9 @@
   "author": "",
   "private": true,
   "license": "UNLICENSED",
+  "engines": {
+    "node": ">=20 <21"
+  },
   "scripts": {
     "build": "nest build",
     "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",

prisma/schema.prisma

@@ -4,6 +4,7 @@
 generator client {
   provider = "prisma-client"
   output   = "../src/generated/client"
+  binaryTargets = ["native", "linux-musl"]
 }
 
 datasource db {

src/dockerfile.spec.ts

@@ -0,0 +1,32 @@
+import { readFileSync } from 'fs';
+import { join } from 'path';
+
+describe('Docker build configuration', () => {
+  const root = join(__dirname, '..');
+  const dockerfile = readFileSync(join(root, 'Dockerfile'), 'utf8');
+  const schema = readFileSync(join(root, 'prisma', 'schema.prisma'), 'utf8');
+  const packageJson = JSON.parse(readFileSync(join(root, 'package.json'), 'utf8'));
+
+  it('uses node:20-alpine for both build and runtime stages', () => {
+    expect(dockerfile).toContain('FROM node:20-alpine AS builder');
+    expect(dockerfile).toContain('FROM node:20-alpine AS runner');
+  });
+
+  it('prunes development dependencies after build', () => {
+    expect(dockerfile).toMatch(/npm prune --production/);
+  });
+
+  it('copies built dist artifacts and generated Prisma client into the final image', () => {
+    expect(dockerfile).toContain('COPY --from=builder /app/dist ./dist');
+    expect(dockerfile).toContain('COPY --from=builder /app/src/generated ./src/generated');
+  });
+
+  it('restricts Prisma engine binaries for Linux musl builds', () => {
+    expect(schema).toContain('binaryTargets = ["native", "linux-musl"]');
+  });
+
+  it('declares a Node engine version constraint in package.json', () => {
+    expect(packageJson.engines).toBeDefined();
+    expect(packageJson.engines.node).toBe('>=20 <21');
+  });
+});