This is intended to be a webservice for the online creation of songbooks.
Songbooks can be created offline, see https://github.com/firefrorefiddle/Liedermappe Both Liedermappe and liedermappe-online use LaTeX/songs.sty and https://github.com/firefrorefiddle/songmaker as their backend. songmaker converts a custom input format to LaTeX files.
cabal install songmaker first, then liedermappe-online