implement reference grpc server

config.yaml

@@ -1,21 +1,29 @@
 # yaml-language-server: $schema=contrib/schema.json
 
 # Custom demo-app config
-demoType:
-  optName: demo opt
-  optField: 99
-demoField: 99
+timezone: EST5EDT
+opts:
+  factLang: en
+  factType: random
 
 # go-app config
-name: Demo go-app HTTP App
+name: Demo go-app
 logging:
   format: console
   level: trace
   enabled: true
 otel:
-  enabled: false
-grpc:
-  enabled: false
+  enabled: true
+  stdoutEnabled: true
 http:
   enabled: true
   listen: :8080
+  logRequests: true
+grpc:
+  enabled: true
+  enableReflection: true
+  listen: :8081
+  grpcGatewayPath: /api
+  enableGRPCGateway: true
+  enableInstrumentation: true
+  logRequests: true