v0.2.1

Fix #29 - Use yarn to start node in Docker image, so yarn can bootstrap node to load PnP dependencies.

v0.2.0 (this version is broken. use v0.2.1 instead.)

Upgrade yarn from classic v1 to modern v4.0.2 (Used locally for build and test)
Upgrade yarn from classic v1 to modern v4.0.2 (Used in deployed Docker images)
Update deployed docker images from node:13-alpine to node:20-alpine
Upgrade all dependencies.