auto-create admin role on startup, use API_BASE_URL for auth redirects

src/constants.ts

@@ -17,6 +17,8 @@ interface EnvKey {
 // ENV CONSTANTS
 
 export const PORT = process.env.PORT;
+export const API_BASE_URL =
+  process.env.API_BASE_URL || `http://localhost:${PORT || 3000}`;
 
 export const prisma = new PrismaClient({ adapter });