Update apollo.ts

@@ -11,7 +11,7 @@ function createApolloClient() {
   return new ApolloClient({
   return new ApolloClient({
     ssrMode: typeof window === "undefined",
     ssrMode: typeof window === "undefined",
     link: new HttpLink({
     link: new HttpLink({
-      uri: "http://localhost:5000/graphql", // Server URL (must be absolute)
+      uri: "http://backend:5000/graphql", // Server URL (must be absolute)
       credentials: "same-origin", // Additional fetch() options like `credentials` or `headers`
       credentials: "same-origin", // Additional fetch() options like `credentials` or `headers`
     }),
     }),
     cache: new InMemoryCache({
     cache: new InMemoryCache({