Can the web-apps module run independently of the document server? How to modify the address of the request back-end server in web-apps
It looks like you ran integrated example of a storage. Please clarify what guide you used. We have information about integration steps with Document server in our official guides. For example: ONLYOFFICE Api Documentation - Example
Edit the default.json configuration file. Specify the name of your local server with the ONLYOFFICE Document Server installed.
Edit the following line:
where the documentserver is the name of the server with the ONLYOFFICE Document Server installed.
One more thing. Please note that it is just an example. We do not recommend you to use it as productive state.