This is the output I get when trying to start the server:

/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- sqlite3 (LoadError)
from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
from ./lib/db.rb:3
from ./knots.rb:70:in `require'
from ./knots.rb:70:in `load_libs'
from ./knots.rb:12:in `initialize'
from ./knots.rb:369:in `new'
from ./knots.rb:369