Create an account with sufficient permissions to be able to merge on protected branches using the workflow features.
Supported host: GitHub
You should create a hook triggered every time new commits are merged on the first step of your workflow (e.g. master) calling Nestor's build API.
This will create a new docker image corresponding to this new version.
Nestor will tag this image with a reference to the version of your application and the commit hash before pushing it to your Docker registry.
This will guarantee that you are using the same version for all environment.