title: Is there a way to open a folder in a container from the VSCode command line using the remote-containers extension?
body: <p>I have created a .devcontainer/devcontainer.json file in the root of my source tree.  But, is there something I can specify on the command line to automatically open the specified folder in that container?  Or at least open up vscode within the container automatically (not necessarily the folder)?</p>
  
  <p>I'm also curious if there is a similar option for attaching to a container (without having to open another window).  </p>
  
  <p>For the former - VS Code does provide a dialog asking if I want to reopen.  That's not bad, I was just hoping there was some argument I could specify on the command line to do one better.</p>
  
  <p>Thanks!</p>