feat: wire sidecar to platform — auth proxy with workspace subdomain, GraphQL proxy, health check

src/graphql-proxy/graphql-proxy.module.ts

@@ -0,0 +1,7 @@
+import { Module } from '@nestjs/common';
+import { GraphqlProxyController } from './graphql-proxy.controller';
+
+@Module({
+    controllers: [GraphqlProxyController],
+})
+export class GraphqlProxyModule {}