NE-5. OpenWeather API, process.argv and files

NE-5. OpenWeather API with process.argv and file writing

OK! Let's try to make a final assessment of what we have learned on all basic node.js skills. 

We will try to combine everything in one exercise. You will have to run a script from node.js command line that will be of the form `node index.js rome` and this will bring all the information for the current weather from Rome and will write it (append it) into a new line of a .txt file. 

If you run again with another city, then the name  of the city and the temperature of it for that day should be written in a new line below the previous one. So the format of your .txt after 5 request to Berlin, Stockholm, Hamburg, Beijing, Tokyo should like like this:

Berlin 15°c 

Stockholm 11°c 

Hamburg 13°c 

Beijing 17°c 

Tokyo 9°c 

Have fun!