Dockerfile and dev/test/prod environment

Question

I want to create Dockerfile that will be able to build three different images (one at the moment). Those images differs only in configuration files.

I was trying: <

Answer 1

If you want 3 different images, use 3 different Dockerfiles. The naming issue is annoying, but you can write a helper script that simply copies files and calls docker build e.g.

cp Dockerfile-cfg1 Dockerfile
docker build -t "cfg1" .
cp Dockerfile-cfg2 Dockerfile
docker build -t "cfg2" .

However, as @user2915097 suggests, a better solution is probably to have a single image and choose the config at run-time. This means less overhead of looking after and maintaining multiple images.