chore: add sample outputs

README.md

@@ -22,3 +22,36 @@ Build:
 $ just buildfn
 ```
 
+Sample output:
+```shell
+$ curl https://174******.cn-shanghai.fc.aliyuncs.com/2016-08-15/proxy/hatter_fc/test_rust_fn/
+GET /2016-08-15/proxy/hatter_fc/test_rust_fn/ HTTP/1.1
+host: 174******.cn-shanghai.fc.aliyuncs.com
+user-agent: curl/7.64.1
+accept: */*
+x-fc-access-key-id: 
+x-fc-access-key-secret: 
+x-fc-account-id: 174******
+x-fc-base-path: /2016-08-15/proxy/hatter_fc/test_rust_fn/
+x-fc-control-path: /http-invoke
+x-fc-function-handler: index.handler
+x-fc-function-memory: 128
+x-fc-function-name: test_rust_fn
+x-fc-function-timeout: 30
+x-fc-qualifier: LATEST
+x-fc-region: cn-shanghai
+x-fc-request-id: 0af673e9-030b-4b30-949c-60c96a3a326d
+x-fc-retry-count: 0
+x-fc-security-token: 
+x-fc-service-logproject: 
+x-fc-service-logstore: 
+x-fc-service-name: hatter_fc
+x-fc-tracing-jaeger-endpoint: 
+x-fc-tracing-opentracing-span-baggages: 
+x-fc-tracing-opentracing-span-context: 
+x-fc-version-id: 
+x-forwarded-for: 125.118.80.*
+x-forwarded-proto: https
+accept-encoding: gzip
+```
+