Thank you!! I had the same problem and this fix worked for me.
The knock gem GitHub page says: "This project is not being maintained and I don't recommend using it in its current form. As an alternative, I recommend using the jwt gem directly."
Could someone post an update in the comments at least showing how to "use the jwt gem directly" ?
Posted in Docker Basics for Rails Discussion
Hey Chris, when I downloaded the Source Code GitHub repo and ran
docker-compose up, it couldn't build sqlite3.
I tried adding a dependency for sqlite-dev in the Dockerfile, then it worked.
I opened a corresponding PR in your repo to add the dependency.