Set custom fields on releases

[geofflamrock]

As part of the new Ephemeral Environments feature, we are introducing the ability to set Custom Fields on releases.

Custom fields allow you to set key/value pairs of strings to releases during creation, which can be then be used:

• To name automatically created ephemeral environments from releases
• As part of a deployment process in scripts and steps using system variables.

Some examples of custom fields may include:

• A GitHub pull request number to add a comment when a deployment to a test environment is completed.
• A Jira ticket number used to name an ephemeral environment that is being used to test changes across multiple projects.

Channels will support configuring a set of required custom fields for releases created in the channel.