This is a nginx configuration file that works for forge systems

forge.magento2.nginx.config

# Magento Vars
# set $MAGE_ROOT /path/to/magento/root;
# set $MAGE_MODE default; # or production or developer
#
# Example configuration:
upstream fastcgi_backend {
    # use tcp connection
    # server  127.0.0.1:9000;
    # or socket
    server   unix:/var/run/php/php7.2-fpm.sock;
}
server {

    set $MAGE_ROOT /home/forge/to_be_changed_with_you_own;
    set $MAGE_MODE developer;
    #include /vagrant/magento2/nginx.conf.sample;
    
    #root $MAGE_ROOT/pub;
    
    
    listen 80;
    listen [::]:80;
    server_name richenergy-magento.staxoweb.co.uk;
    root /home/forge/to_be_changed_with_you_own/pub;
	set $MAGE_ROOT /home/forge/to_be_changed_with_you_own;
	set $MAGE_MODE developer;

    index index.php;
    autoindex off;
    charset off;
    
    add_header 'X-Content-Type-Options' 'nosniff';
    add_header 'X-XSS-Protection' '1; mode=block';
    
    location /setup {
        root $MAGE_ROOT;
        location ~ ^/setup/index.php {
            fastcgi_pass   fastcgi_backend;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }
    
        location ~ ^/setup/(?!pub/). {
            deny all;
        }
    
        location ~ ^/setup/pub/ {
            add_header X-Frame-Options "SAMEORIGIN";
        }
    }
    
    location /update {
        root $MAGE_ROOT;
    
        location ~ ^/update/index.php {
            fastcgi_split_path_info ^(/update/index.php)(/.+)$;
            fastcgi_pass   fastcgi_backend;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            fastcgi_param  PATH_INFO        $fastcgi_path_info;
            include        fastcgi_params;
        }
    
        # deny everything but index.php
        location ~ ^/update/(?!pub/). {
            deny all;
        }
    
        location ~ ^/update/pub/ {
            add_header X-Frame-Options "SAMEORIGIN";
        }
    }
    
    location / {
        try_files $uri $uri/ /index.php?$args;
    }
    
    location /pub {
        location ~ ^/pub/media/(downloadable|customer|import|theme_customization/.*\.xml) {
            deny all;
        }
        alias $MAGE_ROOT/pub;
        add_header X-Frame-Options "SAMEORIGIN";
    }
    
    location /static/ {
        if ($MAGE_MODE = "production") {
            expires max;
        }
        location ~* \.(ico|jpg|jpeg|png|gif|svg|js|css|swf|eot|ttf|otf|woff|woff2)$ {
            add_header Cache-Control "public";
            add_header X-Frame-Options "SAMEORIGIN";
            expires +1y;
    
            if (!-f $request_filename) {
                rewrite ^/static/(version\d*/)?(.*)$ /static.php?resource=$2 last;
            }
        }
        location ~* \.(zip|gz|gzip|bz2|csv|xml)$ {
            add_header Cache-Control "no-store";
            add_header X-Frame-Options "SAMEORIGIN";
            expires    off;
    
            if (!-f $request_filename) {
               rewrite ^/static/(version\d*/)?(.*)$ /static.php?resource=$2 last;
            }
        }
        if (!-f $request_filename) {
            rewrite ^/static/(version\d*/)?(.*)$ /static.php?resource=$2 last;
        }
        add_header X-Frame-Options "SAMEORIGIN";
    }
    
    location /media/ {
        try_files $uri $uri/ /get.php?$args;
    
        location ~ ^/media/theme_customization/.*\.xml {
            deny all;
        }
    
        location ~* \.(ico|jpg|jpeg|png|gif|svg|js|css|swf|eot|ttf|otf|woff|woff2)$ {
            add_header Cache-Control "public";
            add_header X-Frame-Options "SAMEORIGIN";
            expires +1y;
            try_files $uri $uri/ /get.php?$args;
        }
        location ~* \.(zip|gz|gzip|bz2|csv|xml)$ {
            add_header Cache-Control "no-store";
            add_header X-Frame-Options "SAMEORIGIN";
            expires    off;
            try_files $uri $uri/ /get.php?$args;
        }
        add_header X-Frame-Options "SAMEORIGIN";
    }
    
    location /media/customer/ {
        deny all;
    }
    
    location /media/downloadable/ {
        deny all;
    }
    
    location /media/import/ {
        deny all;
    }
    
    location ~ cron\.php {
        deny all;
    }
    
    location ~ (index|get|static|report|404|503)\.php$ {
        try_files $uri =404;
        fastcgi_pass   fastcgi_backend;
    
        fastcgi_param  PHP_FLAG  "session.auto_start=off \n suhosin.session.cryptua=off";
        fastcgi_param  PHP_VALUE "memory_limit=256M \n max_execution_time=600";
        fastcgi_read_timeout 600s;
        fastcgi_connect_timeout 600s;
        fastcgi_param  MAGE_MODE $MAGE_MODE;
    
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        include        fastcgi_params;
    }
    
}