You can add the HTTPS service to runit's system-wide service supervision through the update-service(8) program:
# update-service --add dir fnord-ssl
fnord-ssl-conf arranges for tcpsvd(8) to listen for TCP connections on the address ip:443, and to run sslio(8) under the uid and gid of sslacct, chroot'ed in dir/sslio/, for incoming connections, which in turn starts the fnord program under the uid and gid of acct, chroot'ed to webroot. The names acct and sslacct must not contain any special characters.
fnord-ssl-conf creates an automatically rotated log directory in dir/log/main. The logs are owned by logacct, and the corresponding svlogd(8) process runs under the uid and gid of logacct. The name logacct must not contain any special characters.