add cap-add option

[sellersj]

Feature request to add the option for cap-add and related commands

Please provide a sample input docker run command

docker run --cap-add=NET_ADMIN my-image

What is the current output?*

version: '3.3'
services:
    my-image:
        image: my-image

What is the expected/desired output?

version: '3.3'
services:
    my-image:
        cap_add:
            - NET_ADMIN
        image: my-image

Reference
https://docs.docker.com/compose/compose-file/compose-file-v3/#cap_add-cap_drop

[raphamotta]

Please add this option

[tblancher]

For me, composerize works when --cap_add is added in the input field (note the underscore [_] instead of hyphen/dash [-]), but --cap-add does not work. This is a bug that should be fixed.

[sharevb]

Hi @tblancher, as far as docker run help says, there is no --cap_add option but --cap-add, so this is solved by my PR #571 deployed at https://deploy-preview-571--composerize.netlify.app/