use global client everywhere

db/client.ts

@@ -0,0 +1,16 @@
+import { PrismaClient } from '@prisma/client'
+
+
+declare global {
+  // allow global `var` declarations
+  // eslint-disable-next-line no-var
+  var prisma: PrismaClient | undefined
+}
+
+export const prisma =
+  global.prisma ||
+  new PrismaClient({
+    log: ['query'],
+  })
+
+if (process.env.NODE_ENV !== 'production') global.prisma = prisma