rpcallowip=your.routers.ip.address

If I read you question correctly?

You need to know your routers IP and set this as the rpcallowip in the bitcoin.conf if the bitcoin.conf is on your webhost (digital ocean)



But if your bitcoin.conf is on your home machine, you need to add your webhosts IP address in rpcallowip=your.hosts.ip.address (but I don't think this is what you have)


Use whatsmyip.org to find your routers IP