solidus

Hi Guys, I'm trying to deploy Solidus on heroku from the one click button, but I'v got an error.  Could you telle what to do ?

```Your bundle only supports platforms ["x86_64-darwin-19"] but your local platform
       is x86_64-linux. Add the current platform to the lockfile with `bundle lock
       --add-platform x86_64-linux` and try again.
       Bundler Output: Your bundle only supports platforms ["x86_64-darwin-19"] but your local platform
       is x86_64-linux. Add the current platform to the lockfile with `bundle lock
       --add-platform x86_64-linux` and try again.```

I suspect the one-click setup needs an update to handle this new bundler feature.

(I've admittedly never touched that one click stuff.)

I've seen the error before on Solidus and Rails projects though. I just needed to run that command in the project and commit the change to the Gemfile.lock.