listen on port 80 as /etc/hosts takes care only of the domain and no port may be specified - node server as to ran with sudo :/
create file responsible for starting the server
add node modules dependencies
exec server as last intruction and in foreground
Trap ctrl-c so sites can be unblocked when server is gone

* do not start node server with exec so signal can be trapped
First version of stuff kind of working

* "block-websites" is responsible for blocking websites described in "blocked"
it updates the contents of $file if block is already there or appends it
* remove "focus" file - old commands
* add sup.txt dummy file
* update "server" to call "block-websites"
* MISSING - Unblocking needs to occur in trap signal