This code is based on what the rvm1-capistrano and capistrano-nvm gems
do, but simplified a bit to take advantage of the `fnm exec` command.
Since ExecJS will check for a JavaScript runtime every time the
application is started, we need to include commands like `bundle` (used
when running `bin/delayed_job`), `puma` and `rake`, so Node.js is found
when running these commands. I'm not sure whether `pumactl` is also
necessary, but I've added it for consistency.
We're also including the default commands gems like capistrano-nvm use
because we will add the `npm` command in the near future.
Note that, in order to setup FNM, we need to enter the actual release
folder (using `within release_path` isn't enough). So we have to run
this task after the actual release is created; otherwise many commands
would run in the previous release's folder.
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