Hi @tamir-dahan_7908 ,
Either you're making a typo somewhere, or there is something odd about your Docker/server configuration that is preventing a local network connection. I'm afraid I'm not a Docker expert, so I don't know what else to look for -- it could be specialized security configuration you have or a monitoring tool that's blocking things.
If you have a Docker expert on your team, I would check with them to get some help. Ultimately, ProGet is just an ordinary .NET application making a connection on an ordinary SQL Server that's on the same local network (i.e. inedo-sql)... it's a super-common use case and just works out of the box.
The most common issue is a typo (i.e. inedo-sql in one command and inedosql in another), but since this is such a common use case, if you search "Docker" and "A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible", you'll find a ton of results with lots of different things to try as well.
If you're new to Docker, i would suggest installing with Inedo Hub - it's a lot easier to use.
Cheers,
Alana