Support regex groups in rewrites rules

[M4teo]

Hi, i had high hopes for this nice project to rewrite image URLs with the webhook, but it doesn't seem to support RegEx groups in a few tests i've done. 🥹
In relation to the Bitnami repository migration, it would be great to add a feature like this one:

matches: 
  - '^docker.io/bitnami/(.+)'.
replace: 'docker.io/bitnamilegacy/${1}'.

Is this possible?

[cest-pas-faux]

Just FYI, even if they told everyone that all the images has been migrated to bitnamilegacy -and we assumed they did- , while modifying our clients values file, we found out this is not true.

One example : bitnami/redis:6.2.6-debian-10-r49 does not exist in the bitnamilegacy/redis repo, we had to use bitnamilegacy/redis:6.2.6 instead

Having regex parsing would be a nice feature but for your specific usecase, be careful with bitnamilegacy, they're not 100% reliable.