wordpress page, post url on nginx inside docker container automatically redirect to root domain with 301 status

Question

I have successfully setup a wordpress site running on a dockerized nginx. When the wordpress site is up and running, I can go to the home page: https://my_domain.com or any links or at after wp-admin/... without any problem.

But when I go to https://my_domain.com/sample-page or https://my_domain.com/post-id it immediately redirects to the root domain http://my_domain.com

wordpress nginx post, page url automatically redirects to root domain

with exception route /wp-admin/ when accessed redirects correctly to https://my_domain.com/wp-admin/login.php if not logged in and to https://my_domain.com/wp-admin/ if logged in

Here is my nginx config at /nginx/default.conf:

server {
    listen 80;
    listen [::]:80;
    server_name my_domain.com www.my_domain.com;

    location / {
        return 301 https://my_domain.com$request_uri;
    }
}


server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name my_domain.com www.my_domain.com;

    index index.php index.html index.htm;

    root /var/www/html/wordpress;

    ssl on;
    server_tokens off;
    ssl_certificate /etc/nginx/ssl/live/my_domain.com/fullchain.pem;
    ssl_certificate_key /etc/nginx/ssl/live/my_domain.com/privkey.pem;
    ssl_dhparam /etc/nginx/dhparam/dhparam-2048.pem;

    ssl_buffer_size 8k;
    ssl_protocols TLSv1.2 TLSv1.1 TLSv1;
    ssl_prefer_server_ciphers on;
    ssl_ciphers ECDH+AESGCM:ECDH+AES256:ECDH+AES128:DH+3DES:!ADH:!AECDH:!MD5;

    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "no-referrer-when-downgrade" always;
    add_header Content-Security-Policy "default-src * data: 'unsafe-eval' 'unsafe-inline'" always;
    # add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
    # enable strict transport security only if you understand the implications


    location / {
          try_files $uri $uri/ /index.php$is_args$args;

          proxy_pass http://wordpress_host:80; 
          proxy_set_header Host $http_host;
          proxy_set_header X-Forwarded-Proto $scheme;
    }

    location ~ \.php$ {
          try_files $uri =404;
          fastcgi_split_path_info ^(.+\.php)(/.+)$;
          proxy_pass http://wordpress_host:80;
          fastcgi_index index.php;
          include fastcgi_params;
          fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
          fastcgi_param PATH_INFO $fastcgi_path_info;

          proxy_set_header Host $http_host;
          proxy_set_header X-Forwarded-Proto $scheme;
    }

    location ~ /\.ht {
          deny all;
    }
        
    location = /favicon.ico { 
          log_not_found off; access_log off; 
    }

    location = /robots.txt { 
          log_not_found off; access_log off; allow all; 
    }

    location ~* \.(css|gif|ico|jpeg|jpg|js|png)$ {
          expires max;
          log_not_found off;
    }
}

I also config at wp-config.php:

define('FORCE_SSL_ADMIN', true); 

if ( isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') 
$_SERVER['HTTPS']='on';

define('WP_SITEURL', 'https://www.my_domain.com/');
define('WP_HOME', 'https://www.my_domain.com/');

Update:

Here the docker compose file:

version: '3';
services:
  nginx:
    image: nginx:stable-alpine
    ports:
      - "80:80" # nginx listen on 80
      - "443:443"
    volumes:
      - ./nginx/default.conf:/etc/nginx/conf.d/default.conf:ro
      - ./wordpress/app:/var/www/html/wordpress
  db:
    image: mysql:8.0
    container_name: db-example
    restart: unless-stopped
    env_file: ./wordpress/app/.env
    environment:
      - MYSQL_DATABASE=example
    volumes:
      - ./wordpress/dbdata:/var/lib/mysql
      #- ./wordpress/db/db.sql:/docker-entrypoint-initdb.d/install_wordpress.sql #if you have db.sql of project input here
    command: '--default-authentication-plugin=mysql_native_password'

  wordpress_host:
    depends_on:
      - db
    image: wordpress
    container_name: wordpress_host
    ports:
      - "8080:80"
    restart: unless-stopped
    env_file: ./wordpress/app/.env
    environment:
      - WORDPRESS_DB_HOST=db:3306
      - WORDPRESS_DB_USER=root
      - WORDPRESS_DB_PASSWORD=root
      - WORDPRESS_DB_NAME=example
    volumes:
      - ./wordpress/app:/var/www/html/wordpress
volumes:
  wordpress-host:
  dbdata

: .env file:

MYSQL_ROOT_PASSWORD=root
MYSQL_USER=example
MYSQL_PASSWORD=password