Make local frontend backend configurable

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

frontend/src/client.ts

@@ -1,7 +1,7 @@
 import { ApolloClient, InMemoryCache } from "@apollo/client";
 
 const client = new ApolloClient({
-  uri: `${import.meta.env.VITE_API_URL}/graphql/`,
+  uri: import.meta.env.DEV ? "/graphql/" : `${import.meta.env.VITE_API_URL}/graphql/`,
   cache: new InMemoryCache(),
 });