Ok, I'm using Odoo 12 on Ubuntu 18.04, nginx/1.14.0 with letsencrypt for my ssl certs.

Most everything is working perfectly, however links from the website that redirect are returning the variable I named in the nginx domain config file instead of using the domain.

# Odoo servers
upstream odoo {
      server 127.0.0.1:8069;
}
upstream odoochat {
     server 127.0.0.1:8072;
}
# HTTP -> HTTPS
server {
      if ($host = www.qa.moddulu.com) {
            return 301 https://$host$request_uri;
      } # managed by Certbot
      if ($host = qa.moddulu.com) {
            return 301 https://$host$request_uri;
      } # managed by Certbot
      listen 80;
      server_name www.qa.moddulu.com qa.moddulu.com;
      include snippets/letsencrypt.conf;
      return 301 https://qa.moddulu.com$request_uri;
}
# WWW -> NON WWW
server {
      listen 443 ssl http2;
      server_name www.qa.moddulu.com;
      ssl_trusted_certificate /etc/letsencrypt/live/qa.moddulu.com/chain.pem;
      include snippets/ssl.conf;
      include snippets/letsencrypt.conf;
      return 301 https://qa.moddulu.com$request_uri;
      ssl_certificate /etc/letsencrypt/live/qa.moddulu.com/fullchain.pem; # managed by Certbot
      ssl_certificate_key /etc/letsencrypt/live/qa.moddulu.com/privkey.pem; # managed by Certbot
}
server {
      listen 443 ssl http2;
      server_name qa.moddulu.com;
      proxy_read_timeout 720s;
      proxy_connect_timeout 720s;
      proxy_send_timeout 720s;
      # Proxy headers
      proxy_set_header X-Forwarded-Host $host;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header X-Real-IP $remote_addr;
      # SSL parameters
      ssl_trusted_certificate /etc/letsencrypt/live/qa.moddulu.com/chain.pem;
      include snippets/ssl.conf;
      include snippets/letsencrypt.conf;
      return 301 https://qa.moddulu.com$request_uri;

      ssl_certificate /etc/letsencrypt/live/qa.moddulu.com/fullchain.pem; # managed by Certbot
      ssl_certificate_key /etc/letsencrypt/live/qa.moddulu.com/privkey.pem; # managed by Certbot
}
server {
      listen 443 ssl http2;
      server_name qa.moddulu.com;
      proxy_read_timeout 720s;
      proxy_connect_timeout 720s;
      proxy_send_timeout 720s;
      # Proxy headers
      proxy_set_header X-Forwarded-Host $host;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header X-Real-IP $remote_addr;
      # SSL parameters
      ssl_trusted_certificate /etc/letsencrypt/live/qa.moddulu.com/chain.pem;
      include snippets/ssl.conf;
      include snippets/letsencrypt.conf;
      # log files
      access_log /var/log/nginx/qa.moddulu.com.access.log;
      error_log /var/log/nginx/qa.moddulu.com.error.log;
      # Handle longpoll requests
      location /longpolling {
      proxy_pass http://odoochat;
}
# Handle / requests
location / {
      proxy_redirect off;
      proxy_pass http://odoo;
}
# Cache static files
location ~* /web/static/ {
      proxy_cache_valid 200 90m;
      proxy_buffering on;
      expires 864000;
      proxy_pass http://odoo;
}
# Gzip
gzip_types text/css text/less text/plain text/xml application/xml application/json application/javascript;
gzip on;

ssl_certificate /etc/letsencrypt/live/qa.moddulu.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/qa.moddulu.com/privkey.pem; # managed by Certbot
}

so, for example, I'm trying to log in and and the url is going to 'https://odoo/web' instead of 'https://qa.moddulu.com/web'. the 'odoo' in the link changes with whatever the upstream variable for the server is. I haven't been able to find a solution to this. I've tried rebuilding the server, but that didn't fix the problem.