lighttpd | Behavior of «setenv» directives

I faced with unclear (for me) behavior of «setenv» directives of «lighttpd» webserver and decide perform several experiments and show the results.

Environment and conditions:

• Ubuntu 22.04.2 LTS

• lighttpd 1.4.63-1ubuntu3.1

• Two modifications of default «/etc/lighttpd/lighttpd.conf»:

• Changed listened port to 3000.

• Enabled module «mod_setenv».

• All other changes performs in «/etc/lighttpd/conf-enabled/» folder.

• Defined two URLs\paths («http://10.0.0.90:3000/» and «http://10.0.0.90:3000/admin/») to show how merging works

Outline VPN Server doesn't work after installation

I would like to share with you a solution of one issue of the Outline VPN server. It might be useful for newbies in Linux and Docker. Hope this helps someone.

The issue

After successful installation of Outline VPN server it goes down (Outline Manager can't connect to the server).