Make a copy of /config/config.default.json named config.json (in the same directory)
Get your user credentials for Flickr and enter everything in config.json
Add at least one Flickr user id in config.json
run
node download.js
If all goes well, you should have a data directory with data for the Flickr user. Now you can start the application
npm start
Open your browser at localhost:8080 and you should see a map with markers. When you click these markers, a photo with information should show.