New feature: trigger automated build on docker build context change

[friediisch]

Hi all,

I would like to propose a new feature for Docker Hub automated builds: give users the option to only build containers when the docker build context has changed.

I currently have a Github repository which has several subdirectories, with each directory containing a separate Dockerfile with associated files. I have several docker repositories which are built automatically when I push to the git repo, however ALL containers are rebuilt when ANY of the files change. It seems to me that this wastes compute and storage on your end, and clutters my inbox and container versions on my end. Surely I am not the only one who has this issue...

Best,
friediisch