add gzip encoding to compress resource

src/main/resources/application.yml

@@ -1 +1,6 @@
-
+server:
+  compression:
+    enabled: true
+    excluded-user-agents:
+    mime-types: text/html,text/xml,text/plain,text/css,text/javascript,application/javascript,application/json,image/jpeg,image/png
+    min-response-size: 2048