But there is nothing listening on port 80 (nor 443 for that matter):
osiris@erazer ~ $ curl -LIv http://dropin.today/
* Host dropin.today:80 was resolved.
* IPv6: (none)
* IPv4: 104.196.57.33
* Trying 104.196.57.33:80...
* connect to 104.196.57.33 port 80 from 192.168.x.x port x failed: Connection refused
* Failed to connect to dropin.today port 80 after 186 ms: Could not connect to server
* closing connection #0
curl: (7) Failed to connect to dropin.today port 80 after 186 ms: Could not connect to server
osiris@erazer ~ $
Please doublecheck the IP address or any other issue that may prevent your website from not working. Please make sure nginx is working first and afterwards retry getting a certificate. If nginx is working properly and you're still having trouble, feel free to stop by here again.
You can use e.g. LetsDebug to test if your website is working properly or not. Currently it shows:
dropin.today has an A (IPv4) record (104.196.57.33) but a request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address.