Add build instructions for Doolang

[nynrathod]

No description provided.

[mattgodbolt]

Unfortunately there's a couple issues:

• we are still on Ubuntu 22.04 with an older glibc (see Migrate to 24.04 #1736 )
• folder mismatch. Config says folder: doolang, but the zip's top-level directory is doo-linux-0.4.1. The ziparchive installer runs mv , i.e. mv doolang doolang-0.4.1, which fails since doolang/ never exists. The fix would be folder: doo-linux-{{name}}