Series of questions of replacing the local own server

Dear Survey Solutions support team,

We used our own server (Alibaba Cloud). Recently, Server is about to expire. We are facing the problem of replacing the server. Therefore, I would like to ask how to replace the server. It probably includes the following questions: (1) The existing server is a postgrel SQL statement. Supported, how to back up in the existing server? What should I do? (2) How to migrate data of new and old servers? (3) How can I deploy the new server to continue my interview process? There are no detailed tutorials and other references for learning. Thank you!