0.2.19

Build system update

Replace Azure Pipelines with GitHub Actions for image builds

What's Changed

• Add Github Actions to build Docker images by @mmwinther in #94
• Deploy Jupyterlab images on-prem by @mmwinther in #95
• Fix Nexus port by @mmwinther in #96
• Build on changes to Azure Pipelines file by @mmwinther in #97
• Deploy Jupyterhub on-prem by @mmwinther in #98
• Fix variable reference by @mmwinther in #99
• Pull staging image with 'main' tag by @mmwinther in #100
• Remove old Azure Pipelines definitions by @mmwinther in #101
• Map to env var before using in script by @mmwinther in #102

Full Changelog: 0.2.18...0.2.19