Bugfixes
- Add 'Docker-Content-Digest' header to the response headers.
[4646](https://pulp.plan.io/issues/4646)
- Allow docker remote whitelist_tags to be unset to null.
[5017](https://pulp.plan.io/issues/5017)
- Remove schema1 manifest signature when calculating its digest.
[5037](https://pulp.plan.io/issues/5037)
Improved Documentation
- Switch to using [towncrier](https://github.com/hawkowl/towncrier) for better release notes.
[4875](https://pulp.plan.io/issues/4875)
- Add an example to the whitelist_tag help text
[4994](https://pulp.plan.io/issues/4994)
- Add list of features to the docker landing page.
[5030](https://pulp.plan.io/issues/5030)
Misc
- [4572](https://pulp.plan.io/issues/4572), [#4994](https://pulp.plan.io/issues/4994), [#5014](https://pulp.plan.io/issues/5014)
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