* configure the webserver to listen to the port of the flask application, for example with a subdomain (`cp /etc/nginx/sites-enabled/previousexample.vvvvvvaria.org.conf /etc/nginx/sites-enabled/new.vvvvvvaria.org.conf`)
* expand the current https certificate for this subdomain, using Letsencrypt
* to keep the flask application running in the background: add the new instance of pad2pdf to supervisor (`cp /etc/supervisor/conf.d/previousexample.conf new.conf`)