Route path: /flights/:from-:to
  Request URL: http://localhost:3000/flights/LAX-SFO
  req.params: { "from": "LAX", "to": "SFO" }

  Route path: /plantae/:genus.:species
  Request URL: http://localhost:3000/plantae/Prunus.persica
  req.params: { "genus": "Prunus", "species": "persica" }

  Route path: /test
  Request URL1: https://localhost:3000/test?array=a&array=b&array=c
  Request URL2: https://localhost:3000/test?array[]=a&array[]=b&array[]=c

  app.get('/test', function(req,res){
    console.log(req.query.array); // array=[a,b,c]
    res.send(200);
  });