Support for Dockerfile.some-env

[maxime1992]

Since Docker 1.8 we can do something like that in order to have multiple Dockerfile in the same folder:

docker build -f Dockerfile.db .
docker build -f Dockerfile.web .

See https://stackoverflow.com/a/32108873/2398593

With VSC, we loose intellisense within a file Dockerfile.something file.

[kamcma]

If you add the following to your VSCode settings, you should get it back:

"files.associations": {
    "[Dd]ockerfile*": "dockerfile",
    "docker-compose*": "yaml"
}

For the Dockerfile entry, I'm getting IntelliSense and file icons. The docker-compose entry is giving me IntelliSense but no file icons.

[abbas001]

Thanks its working.

[bwateratmsft]

I think this scenario is entirely covered by #102, so I'll resolve this as duplicate.