How to name Dockerfiles

dev.Dockerfile, test.Dockerfile, build.Dockerfile etc.

On VS Code I use <purpose>.Dockerfile and it gets recognized correctly.

[Please read the full answer]Don't change the name of the dockerfile if you want to use the autobuilder at hub.docker.com. Don't use an extension for docker files, leave it null. File name should just be: (no extension at all)

Dockerfile

However, now you can name dockerfiles like,

test1.Dockerfile
$ docker build -f dockerfiles/test1.Dockerfile  -t test1_app .

or

Dockerfile.test1
$ docker build -f dockerfiles/Dockerfile.test1  -t test1_app .

This will also work.

If you handle multiple files that live in the same context, you could use STDIN:

test1.Dockerfile
$ docker build -t test1_app - < test1.Dockerfile