feat: PostgreSQL support en Vercel CI/CD deployment

- Prisma schema: sqlite → postgresql provider met directUrl
- prisma.config.ts: directUrl toegevoegd
- seed.ts: dynamisch SQLite of PostgreSQL adapter op basis van DATABASE_URL
- ci.yml: preview deploy op PR, productie deploy op push naar main

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -32,8 +32,6 @@ jobs:
 
       - name: Prisma validate
         run: npx prisma validate
-        env:
-          DATABASE_URL: file:./dev.db
 
       - name: Test
         run: npm test
@@ -41,6 +39,68 @@ jobs:
       - name: Build
         run: npm run build
         env:
-          DATABASE_URL: file:./dev.db
+          DATABASE_URL: ${{ secrets.DATABASE_URL }}
-          DIRECT_URL: file:./dev.db
+          DIRECT_URL: ${{ secrets.DIRECT_URL }}
-          SESSION_SECRET: ${{ secrets.SESSION_SECRET || 'ci-placeholder-secret-must-be-32-chars-min' }}
+          SESSION_SECRET: ${{ secrets.SESSION_SECRET }}
+
+  deploy-preview:
+    name: Deploy Preview (PR)
+    runs-on: ubuntu-latest
+    needs: ci
+    if: github.event_name == 'pull_request'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Install Vercel CLI
+        run: npm install -g vercel@latest
+
+      - name: Deploy Preview to Vercel
+        run: vercel deploy --token=${{ secrets.VERCEL_TOKEN }}
+        env:
+          VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}
+          VERCEL_PROJECT_ID: ${{ secrets.VERCEL_PROJECT_ID }}
+
+  deploy-production:
+    name: Deploy Production (main)
+    runs-on: ubuntu-latest
+    needs: ci
+    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Install Vercel CLI
+        run: npm install -g vercel@latest
+
+      - name: Run database migrations
+        run: npx prisma migrate deploy
+        env:
+          DATABASE_URL: ${{ secrets.DATABASE_URL }}
+          DIRECT_URL: ${{ secrets.DIRECT_URL }}
+
+      - name: Deploy Production to Vercel
+        run: vercel deploy --prod --token=${{ secrets.VERCEL_TOKEN }}
+        env:
+          VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}
+          VERCEL_PROJECT_ID: ${{ secrets.VERCEL_PROJECT_ID }}

prisma.config.ts

@@ -13,5 +13,6 @@ export default defineConfig({
   },
   datasource: {
     url: process.env.DATABASE_URL!,
+    directUrl: process.env.DIRECT_URL,
   },
 })

prisma/schema.prisma

@@ -3,7 +3,9 @@ generator client {
 }
 
 datasource db {
-  provider = "sqlite"
+  provider  = "postgresql"
+  url       = env("DATABASE_URL")
+  directUrl = env("DIRECT_URL")
 }
 
 enum Role {

prisma/seed.ts

@@ -1,5 +1,4 @@
 import { PrismaClient } from '@prisma/client'
-import { PrismaBetterSqlite3 } from '@prisma/adapter-better-sqlite3'
 import * as dotenv from 'dotenv'
 import * as path from 'path'
 import * as bcrypt from 'bcryptjs'
@@ -15,9 +14,19 @@ async function main() {
   const url = process.env.DATABASE_URL
   if (!url) throw new Error('DATABASE_URL is not set. Check .env.local')
 
-  // For SQLite: adapter takes a config object with url
+  if (url.startsWith('file:')) {
-  const adapter = new PrismaBetterSqlite3({ url })
+    // SQLite (local development)
-  prisma = new PrismaClient({ adapter })
+    const { PrismaBetterSqlite3 } = await import('@prisma/adapter-better-sqlite3')
+    const adapter = new PrismaBetterSqlite3({ url })
+    prisma = new PrismaClient({ adapter })
+  } else {
+    // PostgreSQL (Neon / production)
+    const { Pool } = await import('pg')
+    const { PrismaPg } = await import('@prisma/adapter-pg')
+    const pool = new Pool({ connectionString: url })
+    const adapter = new PrismaPg(pool)
+    prisma = new PrismaClient({ adapter })
+  }
 
   console.log('Seeding database...')