Added support for working directory parameter of docker exec

Author: Jordan Walsh

docs/schema/vimspector.schema.json

@@ -186,6 +186,10 @@
                           "type": "array",
                           "items": { "type": "string" },
                           "description": "A single command to execute for remote-launch. Like runCommands but for a single command."
+                        },
+                        "workdir": {
+                          "type": "string",
+                          "description": "For containers. The value passed to docker exec for the working directory."
                         }
                       }
                     }

python3/vimspector/debug_session.py

@@ -1684,6 +1684,8 @@ def _GetShellCommand( self ):
 
   def _GetDockerCommand( self, remote ):
     docker = [ 'docker', 'exec', '-t' ]
+    if 'workdir' in remote:
+        docker.extend(["-w", remote['workdir']])
     docker.append( remote[ 'container' ] )
     return docker