SVR.JS is a web server running on Node.JS. This npm package supplies only create-svrjs-server utility for installing and updating SVR.JS on current working directory. It doesn't include SVR.JS itself. To install SVR.JS type one of those commands:

create-svrjs-server lts #Latest SVR.JS LTS version
create-svrjs-server latest #Latest SVR.JS version
create-svrjs-server 3.6.4 #SVR.JS 3.6.4 (replace 3.6.4 with your desired version)