Odoo Config file

The Odoo config file /opt/odoo/.odoorc needs to have the setting proxy_mode = True set

Odoo Settings

Goto the Settings -> Activate Developer Mode -> Technical Menu -> Parameters -> System Parameters ->   "web.base.url" Field Value Changed "http://mycompany.com" to "https://"mycompany.com
Key web.base.url

Value https://mycompany.com

Key    web.base.url.freeze
Value    True

Fix NGINX virtual host config file

Example of NGINX Config file

server {
        listen       80;
        server_name  myaccount.mycompany.com;
        access_log  /var/log/www/myaccount.mycompany.com.access.log;  
        error_log  /var/log/www/myaccount.mycompany.com.error.log error; 
        rewrite ^ https://$http_host$request_uri? permanent;    # force redirect http to https
        index  index.html index.htm;  
    }
    server {
        listen 443 ssl;
        ssl_certificate /etc/ssl/servercerts/wildcard.mycompany.com.chained.crt;        # path to your cacert.pem
        ssl_certificate_key /etc/ssl/servercerts/wildcardnp.mycompany.com.key;    # path to your privkey.pem
        server_name myaccount.mycompany.com;                    #Domain Name
        proxy_set_header X-Forwarded-For $remote_addr;

        add_header Strict-Transport-Security "max-age=31536000; includeSubdomains";
        server_tokens off;

        location / {
            error_page 502 =503 https://www.domainsomewhere/account-unavailable/;
            proxy_pass http://svl-c4i-700.cdn.localdomain.net:8069;
            ## Odoo Settings        
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-NginX-Proxy true;
            proxy_set_header X-Forwarded-Proto https;
            proxy_set_header X-Forwarded-Host $host;
            proxy_redirect off;
            proxy_request_buffering off;
            proxy_connect_timeout  36000s;
            proxy_read_timeout  36000s;
            proxy_send_timeout  36000s;
            send_timeout  36000s;
            client_max_body_size 10240m;
            ###
            }
        location https://www.domainsomewhere.com/account-unavailable/ {
          return 503;
            }
        }