About the problem of Nginx reverse proxy?

my site is hosted on the "Code Cloud Gitee" platform. When doing another demo, the request for the site Json file failed due to a cross-domain problem. Du Niang said that the need to rent a server through the "Nginx reverse proxy" solution, but deno can not be developed in the server environment.
is there any good cross-domain approach suitable for my situation? Ask for recommendation! Thank you.

Json javascript nginx
Jun.15,2022

just point to the 127.0.0.1 host file and change it to the url of your request site

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bebb75-31a95.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bebb75-31a95.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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