https://classroom.udacity.com/courses/ud615/lessons/7826112332/concepts/81473137730923
Note: Cloud Shell comes with an installed Go, but it's not the most recent version, so you should perform the steps below to install the latest Go and set GOPATH.
wget https://storage.googleapis.com/golang/go1.6.2.linux-amd64.tar.gz
sudo rm -rf /usr/local/go
sudo tar -C /usr/local -xzf go1.6.2.linux-amd64.tar.gz
echo "export GOPATH=~/go" >> ~/.bashrc
source ~/.bashrc
mkdir -p $GOPATH/src/github.com/udacity
cd $GOPATH/src/github.com/udacity
git clone https://github.com/udacity/ud615
Get ready for the next lesson
cd ud615/app