I cant find an answer about this !
If you want to enter the bash about Docker Container you use ;
1) docker run -it "Image" sh
There are some examples that when you enter the Interactive Node you type like this ;
docker run -it node
And after this you DONT enter to the bash ,you directly enter to the node console.
I checked the DockerFile of node,and the CMD it says:
So,i guess when you do docker run -it "Image" without nothing else,docker will execute the CMD command inside DockerFile.
Please,let me know if i am wrong.