Use Nginx as a reverse proxy in Azure Container App

There are many issues when migrating from App Service with Docker Compose to Azure Container Apps. The NGINX configuration files should be modified accordingly. Just FYR: the following of default.conf file works well for me 

variables_hash_bucket_size      128;
variables_hash_max_size         2048;

server {
    listen 80;
    server_name nginx.xxx-xxxxxxxx.southeastasia.azurecontainerapps.io;
    large_client_header_buffers 4 128k;
    proxy_read_timeout 300;
    proxy_connect_timeout 300;
    proxy_send_timeout 300;

    location / {
        proxy_pass              http://app1.internal.xxx-xxxxxxxx.southeastasia.azurecontainerapps.io;
        proxy_http_version      1.1;
        proxy_set_header        Upgrade $http_upgrade;
        proxy_set_header        Connection keep-alive;
        proxy_set_header        X-Real-IP               $remote_addr;
        proxy_set_header        X-Forwarded-For         $proxy_add_x_forwarded_for;
        proxy_set_header        X-Forwarded-Ssl         on;
        proxy_set_header        X-Forwarded-Proto       https;
        proxy_set_header        X-Forwarded-Host        $host;
        proxy_set_header        X-Forwarded-Server      $host;
        add_header              Front-End-Https         on;
        fastcgi_buffers         32                      32k;
        fastcgi_buffer_size     64k;
        proxy_buffer_size       128k;
        proxy_buffers           4                       256k;
        proxy_busy_buffers_size 256k;
        proxy_read_timeout      300;
        proxy_connect_timeout   300;
        fastcgi_read_timeout    300;
    }

    location /api {
        rewrite /api/(.*) /$1 break;
        proxy_pass              http://app2.internal.xxx-xxxxxxxx.southeastasia.azurecontainerapps.io;
        proxy_http_version      1.1;
        proxy_read_timeout      300;
        proxy_connect_timeout   300;
        fastcgi_read_timeout    300;
    }
}