Passbolt behind two proxy

Hi
I have installed passbolt on a machine with nginx without ssl force ,but i have a another nginx self-hosted in my network it act as public proxy server so i wanna open my passbolt in public with ssl and when i configure nginx i got the result 200 in access log file but the webpage is blank and nothing to show, while i can open passbolt via private ip address, the reason why i am doing this because i just have a 1 public ip address , so could anyone help me :slightly_smiling_face:

Here is the access logs:

"GET /auth/login?redirect=%2F HTTP/2.0" 200 1107 "

And Here is my front public proxy config:

upstream pass1 {
	server 192.168.10.112:80;
}

server {
    listen 80;
    server_name pass.example.com;

    # Redirect HTTP to HTTPS
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl http2;
    server_name pass.example.com;

    # SSL certificates
    ssl_certificate /etc/letsencrypt/live/pass.example.com/fullchain.pem; 
    ssl_certificate_key /etc/letsencrypt/live/pass.example.com/privkey.pem;

    # SSL settings
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;

    #Log
    access_log /var/log/nginx/passbolt.access.log;
    error_log /var/log/nginx/passbolt.error.log;


    # Proxy to backend server
    location / {
        proxy_pass http://pass1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # Timeout settings
        proxy_connect_timeout 60s;
        proxy_read_timeout 60s;
        proxy_send_timeout 60s;
#	try_files $uri $uri/ /index.php?$args;

#	add_header Access-Control-Allow-Origin "https://pass.example.com";
#	add_header Access-Control-Allow-Methods "GET, POST, OPTIONS";
#	add_header Access-Control-Allow-Credentials "true";
#
#	proxy_cookie_path / "/; secure; HttpOnly; SameSite=None";
    }
}

it solved when i change the passbolt.php public URL to https://pass.example.com