add spring-configuration-metadata.json (#603)

diff --git a/dubbo-admin-server/src/main/resources/META-INF/spring-configuration-metadata.json b/dubbo-admin-server/src/main/resources/META-INF/spring-configuration-metadata.json
new file mode 100644
index 0000000..fc5b9a8
--- /dev/null
+++ b/dubbo-admin-server/src/main/resources/META-INF/spring-configuration-metadata.json
@@ -0,0 +1,10 @@
+{
+  "properties": [
+    {
+      "name": "admin.check.authority",
+      "type": "java.lang.Boolean",
+      "description": "Whether to enable basic authentication.",
+      "defaultValue": true
+    }
+  ]
+}