Patch release for security

What's Changed

Primary motivation for release is that base image of Dockerfile used for serving has been bumped, which closes known vulnerabilities in openssl in that base image.

• Bump base image in Dockerfile by @mhutchinson in #111
• Bump alpine from 3.17.3 to 3.19.1 in /cmd by @dependabot in #115

This release also includes the new endpoint to get all witnesses the distributor is configured with.

• Expose an endpoint with all of the witness keys by @mhutchinson in #114

Full Changelog: v0.1.0...v0.1.1