simplify context timeout for readiness (#9772)

additionally also add CORS support to restrict
for specific origin, adds a new config and
updated the documentation as well

cmd/config/api/help.go

@@ -39,5 +39,11 @@ var (
 			Optional:    true,
 			Type:        "duration",
 		},
+		config.HelpKV{
+			Key:         apiCorsAllowOrigin,
+			Description: `set comma separated list of origins allowed for CORS requests e.g. "https://example1.com,https://example2.com"`,
+			Optional:    true,
+			Type:        "csv",
+		},
 	}
 )