filename1 = Absolute path of file containing a list of domains to renew/create certs for
username = the username used for docker-compose file stuffs
filename2 = Absolute path of the .ini file containing the digitalocean API key to be used for the DNS challenge
container-name = the name of the container in the docker-compose.yml file to be restarted to use the newly created certs
This script expects certbot and docker-compose to already be installed, the docker-compose.yml file to be in the top level of the docker-compose usernames home folder, the certs you wish to use for your nginx-proxy to be going in the docker-compose user's `certs` folder.
See [here](https://hostlaunch.io/docs/how-to-get-a-digitalocean-api-key/) for how to get your API key and [here](https://certbot-dns-digitalocean.readthedocs.io/en/stable/) for how to create the .ini file it'll be stored in as well as the permissions required to be applied on that file.