let codegen pick graphql endpoint from env var

web/codegen.ts

@@ -1,7 +1,10 @@
 import { CodegenConfig } from "@graphql-codegen/cli";
 
+import { loadEnvConfig } from "@next/env";
+loadEnvConfig(process.cwd());
+
 const config: CodegenConfig = {
-  schema: "http://127.0.0.1:8000/api/graphql/",
+  schema: process.env.GRAPHQL_ENDPOINT,
   documents: ["src/**/*.tsx", "src/**/*.ts"],
   ignoreNoDocuments: true, // for better experience with the watcher
   generates: {