Update nginxproxymanager-install.sh

- add plugin for certbot to obtain certificates using a DNS TXT record for Porkbun domains
- fixes https://github.com/tteck/Proxmox/issues/1790

install/nginxproxymanager-install.sh

@@ -30,7 +30,7 @@ $STD apt-get -y install \
   git
 msg_ok "Installed Dependencies"
 
-msg_info "Updating Python"
+msg_info "Installing Python Dependencies"
 $STD apt-get install -y \
   python3 \
   python3-dev \
@@ -38,10 +38,10 @@ $STD apt-get install -y \
   python3-venv \
   python3-cffi \
   python3-certbot \
-  python3-certbot-dns-cloudflare
-
+  python3-certbot-dns-cloudflare \
+  pip3 install certbot_dns_porkbun
 $STD python3 -m venv /opt/certbot/
-msg_ok "Updated Python"
+msg_ok "Installed Python Dependencies"
 
 VERSION="$(awk -F'=' '/^VERSION_CODENAME=/{ print $NF }' /etc/os-release)"