disable multiple team creation for self-hosters

apps/web/src/server/api/routers/team.ts

@@ -1,4 +1,6 @@
+import { TRPCError } from "@trpc/server";
 import { z } from "zod";
+import { env } from "~/env";
 
 import { createTRPCRouter, protectedProcedure } from "~/server/api/trpc";
 
@@ -21,6 +23,16 @@ export const teamRouter = createTRPCRouter({
         return;
       }
 
+      if (!env.NEXT_PUBLIC_IS_CLOUD) {
+        const _team = await ctx.db.team.findFirst();
+        if (_team) {
+          throw new TRPCError({
+            message: "Can't have multiple teams in self hosted version",
+            code: "UNAUTHORIZED",
+          });
+        }
+      }
+
       return ctx.db.team.create({
         data: {
           name: input.name,