detect lowercase dockerfile name

[cdrani]

Currently only detects capitalized file name:

autocmd BufRead,BufNewFile Dockerfile set ft=Dockerfile
autocmd BufRead,BufNewFile Dockerfile* set ft=Dockerfile

except for wildcards:

autocmd BufRead,BufNewFile *.dock set ft=Dockerfile
autocmd BufRead,BufNewFile *.[Dd]ockerfile set ft=Dockerfile

Is there a strict reason why it can't support lowercase filenames with no extensions? I am new to docker and curious about this.

[kwakwaversal]

Seems reasonable to accept both Dockerfile and dockerfile.

The creators of docker addressed this specifically moby/moby#10807 which inspired moby/moby#10858.

I've yet to come across the file extension .dock but that's not to say it's not a thing. I typically do Dockerfile.foo and Dockerfile.bar.