Automatic upgrade for Gitea on Linux AMD64

WARNING

No guarantees, only tested in my environment, don't come and complain.

Prerequisite

Please fill in the work and gitea variables at the beginning of the script (usually, only work have to be customize).

Use

./upgrade-gitea.sh

You can specify a version, else it take the last stable.

If something go wrong, you will find a backup of your last executable in /tmp/gitea