switch db from fauna to prisma & planetscale (#971)

lib/helpers/prisma.ts

@@ -0,0 +1,21 @@
+import { PrismaClient } from "@prisma/client";
+
+// PrismaClient is attached to the `global` object in development to prevent
+// exhausting your database connection limit.
+//
+// Learn more:
+// https://pris.ly/d/help/next-js-best-practices
+
+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;