added pre-build 'meteor npm install' step

[andrew-wharton]

#7 This is needed so that npm dependencies are available when building the application

[athyuttamre]

+1 this needs to be merged ASAP.

[lfilho]

I think this is a sensible addition. Any thoughts, @kadirahq ?

[gkrizek]

+1

[nzwade]

+1

[rhyslbw]

If this isn't being maintained is there a canonical fork we can use?

[jshimko]

I don't think this project is really maintained anymore (or at least not often). You're welcome to use my Meteor base image. It's pretty much identical to meteord as far as features.

https://github.com/jshimko/meteor-launchpad

I use and maintain it regularly and I'm always open to contributions.

[rhyslbw]

Thanks @jshimko, checking it out now

[JulianKingman]

Thank you @jshimko