chore: add secrets.json to .gitignore

Author: surajkumar

.gitignore

@@ -145,6 +145,7 @@ gradle-app.setting
 # End of https://www.toptal.com/developers/gitignore/api/netbeans,intellij,java,gradle,eclipse
 application/db/
 config.json
+secrets.json
 application/config.json
 *.db
 *.db-shm