Try
ssh -p 2222 ssh.youcanjustbuildthings.shopTrust checkcurl -fsSL https://youcanjustbuildthings.shop
/api/ycjbt/ssh/known-hosts
>> ~/.ssh/known_hostsTrust + connectcurl -fsSL https://youcanjustbuildthings.shop
/api/ycjbt/ssh/known-hosts
>> ~/.ssh/known_hosts && ssh -p 2222 ssh.youcanjustbuildthings.shopVerifycat ~/.ssh/known_hosts | grep ssh.youcanjustbuildthings.shop