Add build in setup command

[malomarrec]

When using this repo for the first time and following README instructions, users won't have a build dist in the folder.
Running nm run setup will fail.
Adding npm run build in npm run setup makes it so you can "just follow the README instructions".

[enuchi]

Sure, let me take a look at this. Do you know why setup is failing if there's no dist folder?

[enuchi]

Looking more into this it looks like clasp was updated at some point and now tries to add the .clasp.json file and appscript.json manifest into the rootDir (./dist in this case).

Was able to find a relevant issue described here: google/clasp#869
Relevant code in PR that changed this behavior: https://github.com/google/clasp/pull/865/files#diff-b6d810b0306723c2b160e529addd463ae24be806303358ff1f6a2209bc13357dR108-R114

Thanks for flagging this. Need to think if running build first is the best solution though. May need to just reorganize files and update README.

[enuchi]

I'm going to create a new PR here: #137

This is somewhat of a workaround and less than ideal, but think it is the least disruptive to the project and allows users to just follow the README steps for setup. It should work now without a dist directory.