How to download and setup efm-langserver
Open terminal and run command
git clone https://github.com/mattn/efm-langserver.git
git clone is used to create a copy or clone of efm-langserver repositories.
You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with efm-langserver https://github.com/mattn/efm-langserver/archive/master.zip
Or simply clone efm-langserver with SSH
[email protected]:mattn/efm-langserver.git