Integrate a spell and/or grammar check into build system

[markmandel]

It's super easy to miss misspelled words in our .md documentation files.

It would be great if there was a spellchecker (and maybe even a grammar / documentation helper?) integrated into the build system to ensure the documentation continues to be written well.

We could probably just install aspell and call it directly.

Or maybe something like write-good - but I don't know if we want to add node to our build images. Maybe there is a go version somewhere? Or an online service? Possibly worth exploring.

[markmandel]

There is this docker image, that seems to get updated regularly.
https://hub.docker.com/r/hochzehn/write-good/
Could possibly be integrated into cloud builder and/or used as a make target.

[cyriltovena]

Started to use locally https://github.com/golangci/golangci-lint which advertise faster (also a lot less memory usage) than gometalinter, looks good so far.

They have an optional spellchecker (https://github.com/client9/misspell).

We could do a two birds one stone here ? Improve lint target and have grammar check.

@markmandel Can you have a look at https://github.com/golangci/golangci-lint and let me know what do you think ?

[markmandel]

I think we looked at this a while back as well - for the same reasons. @enocom do you have any thoughts or feelings?

Need to make sure our exclude list still works. I'd also like to add goimport testing too.

[enocom]

It would be nice to use misspell, especially if we're going to switch to golangci-lint.

[markmandel]

I say -- let's do it!

Also linking #237 to this, as it looks like the work crosses between the tickets.