This is currently a modded minecraft server, running the FTB Beyond modpack. FTB has launchers for all sorts of computers: windows, mac and linux. You'll need java (probably version 8) and a minecraft account. Once you download the launcher from Feed The Beast, you can search for "beyond" under Modpacks and then Browse. You want version 1.11.0. It should be the only version available.
Once you get it booted (this can take quite a while) you'll want to click Multiplayer and then Add server. Set the Server Address to
lodgecraft.club
and then click Done. You should now be able to join the server.
If you need help, Graham set this up, go yell at him on slack.