How can I figure out why testcafe is so slow in Docker
I figured out that that the testcafe proxy was being slowed down. After some limited success with passing --no-proxy-server to chrome, I made the networking in docker more permissive, and that stopped the slowdown.
You can use command option -d, --debug-mode # and docker you can use
docker logs --follow ContainerName/ContainerID, you can find how to work docker log here
You can find error log because slow you docker container