Depends on whether or not it will be a SaaS or self-hosted. If it's the former, stack doesn't matter. Just use whatever you're most productive in. If it's the l

Depends on whether or not it will be a SaaS or self-hosted. If it's the former, stack doesn't matter. Just use whatever you're most productive in. If it's the latter, I'd go for something very easy to deploy. PHP, despite it's shortcomings (speaking as a long-time PHP developer here), is very very easy to deploy and PHP7 really doesn't suck. RoR is also a reasonably good choice, as a lot of shared hosts run it with Passenger (or whatever the tech is), so end users can just upload the files and not mess with server config or anything.