Configurable binding IP address and port in webuicfg.yaml

[s5uishida]

The binding IP address and port for WebUI can be set as follows.

According to config.go, scheme parameter in webuicfg.yaml is a required attribute, so this parameter is not used in webui_init.go, but set it to http for the time being.

For example of webuicfg.yaml

@@ -3,6 +3,10 @@
   description: WebUI initial local configuration
 
 configuration:
+  webServer:
+    scheme: http
+    ipv4Address: 192.168.0.141
+    port: 5001
   mongodb: # the mongodb connected by this webui
     name: free5gc # name of the mongodb
     url: mongodb://localhost:27017 # a valid URL of the mongodb

In this case, starting the WebUI will output the log as follows.

...
2023-08-12T19:50:01.692442110+09:00 [INFO][WEBUI][Init] Create tenant: admin
2023-08-12T19:50:01.693665041+09:00 [INFO][WEBUI][Init] Create user: admin
[GIN-debug] [WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.
Please check https://pkg.go.dev/github.com/gin-gonic/gin#readme-don-t-trust-all-proxies for details.
[GIN-debug] Listening and serving HTTP on 192.168.0.141:5001

[ianchen0119]

Hi @brianchennn

please help to review this PR.