The response shows the nginx version

## Summary: On visiting the https://cache.judge.me/ .It show the nginx version ## Steps To Reproduce: ==send :== ``` GET / HTTP/1.1 Host: cache.judge.me Cookie: _ga=GA1.2.907415772.1636450777; _gid=GA1.2.1767694824.1636450777; _fbp=fb.1.1636450778172.127612364; _hjid=00598a42-40f4-48cb-84ec-20b9bd4273cd; _hjFirstSeen=1; _fw_crm_v=525f94b4-2c39-4a15-fdd9-de190f62db0e; _hjAbsoluteSessionInProgress=0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Upgrade-Insecure-Requests: 1 Cache-Control: max-age=0 Te: trailers Connection: close Content-Length: 0 ``` ==And the response shows the nginx version== ```HTTP/2 200 OK Date: Tue, 09 Nov 2021 04:22:44 GMT Content-Type: application/json; charset=utf-8 Content-Length: 21 Server: nginx/1.20.0 Vary: origin Access-Control-Allow-Credentials: true Access-Control-Expose-Headers: WWW-Authenticate,Server-Authorization Cache-Control: no-cache Accept-Ranges: bytes {"message":"Welcome"}``` If you want more information comment below ## Impact An attacker can use this information for further attacks