Merge branch 'edit-row-modal-form' of github.com:italkco/parse-dashboard into edit-row-modal-form

* 'edit-row-modal-form' of github.com:italkco/parse-dashboard:
  Update README.md (parse-community#1455)

Author: NinoZX

README.md

@@ -112,6 +112,8 @@ PARSE_DASHBOARD_USER_PASSWORD: "pass"
 PARSE_DASHBOARD_SSL_KEY: "sslKey"
 PARSE_DASHBOARD_SSL_CERT: "sslCert"
 PARSE_DASHBOARD_CONFIG: undefined // Only for reference, it must not exist
+PARSE_DASHBOARD_COOKIE_SESSION_SECRET: undefined // set the cookie session secret, defaults to a random string. Use this option if you want sessions to work across multiple servers, or across restarts
+
 ```
 
 ## Managing Multiple Apps