If this is a JS runtime in 100 lines of code, a file with 'node\n' would be a single line JS runtime, just start it with 'sh runtime.sh' and make sure you have

If this is a JS runtime in 100 lines of code, a file with 'node\n' would be a single line JS runtime, just start it with 'sh runtime.sh' and make sure you have the nodejs executable in your path...