ddc_challenge submission readme guide

[jhurlbut]

I'm not sure why the flightmare folder needs to be copied as in this part of the readme:

Before the submission please be sure to have built your code and that everything works, then copy your code and everything else you might need in the container home directory.

cd path_to_dodge_drone_challenge_folder && cp ./flightmare ./../ if you have used the folder conventions above.

Also the command above seems like it needs a -R flag? and would copy the files into the directory above the challenge folder.

docker push you-dockerhub-account/dodgedrone-challenge::submission-"your-surname"-"your-name"

I think there is an extra : in this command