update 2

src/lib/db.ts

@@ -5,29 +5,34 @@ declare global {
   var prisma: PrismaClient | undefined;
 }
 
-let prisma: PrismaClient;
+// Guard: don't attempt a real DB connection at build time when env vars are absent.
+// During `next build` inside Docker, DB_HOST is not injected — only available at runtime.
+function createPrismaClient(connectionLimit: number): PrismaClient {
+  if (!process.env.DB_HOST) {
+    // Return a shell client with no adapter — all queries will throw and be caught
+    // by the try/catch in callers (e.g. getSettings returns DEFAULT_SETTINGS).
+    return new PrismaClient();
+  }
 
-if (process.env.NODE_ENV === 'production') {
   const adapter = new PrismaMariaDb({
     host: process.env.DB_HOST,
-    port: Number(process.env.DB_PORT),
+    port: Number(process.env.DB_PORT) || 3306,
     user: process.env.DB_USERNAME,
     password: process.env.DB_PASSWORD,
     database: process.env.DB_NAME,
-    connectionLimit: 10,
+    connectionLimit,
   });
-  prisma = new PrismaClient({ adapter });
+
+  return new PrismaClient({ adapter });
+}
+
+let prisma: PrismaClient;
+
+if (process.env.NODE_ENV === 'production') {
+  prisma = createPrismaClient(10);
 } else {
   if (!global.prisma) {
-    const adapter = new PrismaMariaDb({
-      host: process.env.DB_HOST,
-      port: Number(process.env.DB_PORT),
-      user: process.env.DB_USERNAME,
-      password: process.env.DB_PASSWORD,
-      database: process.env.DB_NAME,
-      connectionLimit: 5,
-    });
-    global.prisma = new PrismaClient({ adapter });
+    global.prisma = createPrismaClient(5);
   }
   prisma = global.prisma;
 }