Please use a Blank template from c9.io
Paste below commands to c9 terminal.
source <(curl -s https://raw.githubusercontent.com/restcoder/sh/master/c9-install.sh)
Node.js is already installed with the CLI
source <(curl -s https://raw.githubusercontent.com/restcoder/sh/master/c9-install-ruby.sh)
source <(curl -s https://raw.githubusercontent.com/restcoder/sh/master/c9-install-python.sh)
source <(curl -s https://raw.githubusercontent.com/restcoder/sh/master/c9-install-dotnet.sh)
source <(curl -s https://raw.githubusercontent.com/restcoder/sh/master/c9-install-postgres.sh)