Add Content about how to use env file

README.md

@@ -27,4 +27,12 @@ The following solution solved the issue for me.
 public AuthenticationManager authenticationManager(AuthenticationConfiguration authenticationConfiguration) throws Exception {
     return authenticationConfiguration.getAuthenticationManager();
 }
-```
+```
+
+# Profile
+Set ```application.yml``` to use ```.dev.env``` file
+```
+spring:
+  config:
+    import: optional:file:.dev.env[.properties]
+```