Exclude vendor folder from docker build context

[michielbdejong]

trafficstars

I got an 'inconsistent vendoring' error when running 'docker build -f Dockerfile.revad .' This change made the error go away. Is there a reason not to exclude the the vendor folder from the docker build context?

[update-docs[bot]]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

[butonic]

@wkloucek I think this makes sense, pinging you because you are more familiar with docker containers than I am.

[butonic]

@michielbdejong can you add a changelog to make CI happy?

[michielbdejong]

Closing as stale.