You use Google assistant? That requires https…
no i use alexa which also needs https, but you set your https in NGINX, so no problem there.
Other thing, when you are in your LAN you can’t access your instances with https://xxx.duckdns.irg:5050?
Basically you need two url for when you browse outside your LAN and inside?
right.
when you want to stay inside your network, you cant use an outside DNS 
Bad thing for WAF
The only issue i have had is displaying cameras when the main install is on https. If you open your camera link directly on one tab in the same browser the camera then shows in your dashboard
Also I use my duckdns address both inside and outside my network. Much simpler for other users (the wife)
i shouldnt know why.
how many times do you need an url anyway?
i created a few buttons on the mobile from my wife.
dashboards are always running automaticly.
my wife doesnt even know which address HA is on. not internal, not external.
THATS simple for users
whats not simple?
my wife complaining that she has a terrible time to reach dashboards or HA, because there is a bad internet connection! trying to explain to her why she cant put on the lights when the internet is down!
can you give me a link on how to install a nginx as per your installation?
I have a pi3 with on it DHCP server, pihole, and piVPN, I think it can also be a nginx server? Damn these things are so complicated …
“google raspberry pi install NGINX”
and you can have as many servers as you want, as long as you maker sure they all have different addresses.
pi with DHCP? doesnt your router provide that?
I find easier/faster to assign the static addresses with DHCP program inside pihole program
tried and failed 3 times with 3 different guides
if i have to guess, not installing did go wrong, but configuring?
and configuring is very specific for your case.
istalling is nothing more then:
sudo apt-get update
sudo apt-get install nginx
and documentation from nginx how to work with it:
https://nginx.org/en/docs/