chore: add postinstall script for prisma (#707)

Signed-off-by: Anthony D. Mays <[email protected]>

Author: anthonydmays

Diff for: lib/javascript/fullstack_demo/package.json

@@ -8,7 +8,8 @@
     "start": "next start",
     "lint": "next lint",
     "fix": "prettier . --write",
-    "test": "vitest"
+    "test": "vitest",
+    "postinstall": "prisma generate"
   },
   "dependencies": {
     "@clerk/nextjs": "^6.9.2",
@@ -40,4 +41,4 @@
     "vitest": "^2.1.8",
     "vitest-fetch-mock": "^0.4.3"
   }
-}
+}