Let me apologise in advance for complaining on an open-source project instead of trying to contribute.
Anyway, my personal feelings were that some of the dependencies could have been avoided (or perhaps set to some default value), at least for the community edition that I'm supposed to get up and running on an existing server machine.
Some examples: * Requiring Python (for a Rails project!), * Asking me to create special system users for the processes, * Setting paths, keys and chmods manually (and not in some install.sh process), * Configuring a database and access to it (this could easily use a default setting that pro users could edit manually).
From the comments around here, I realize that maybe I looked at the project in the wrong way and it should be installed either as a standalone service or as a virtual machine. If that's the case, I think a short Readme or Install doc explaining that would be very helpful for most users.