How to open a site on docker on the Internet through a specific port?

Question

Nginx

Hello! Situation: A docker site is running on a VPS. Here is the docker-compose.yml of the container:

version: '2.2'

services:
  postgres:
    image: postgres:12-alpine
    environment:
      - POSTGRES_USER=uzver
      - POSTGRES_PASSWORD=password
      - POSTGRES_DB=uzver
    volumes:
      - ./volumes/postgres:/var/lib/postgresql/data
    restart: always

  uzver:
    image: dessalines/uzver:0.12.0
    ports:
      - "127.0.0.1:8536:8536"
    restart: always
    environment:
      - RUST_LOG="warn,uzver_server=info,uzver_api=info,uzver_api_common=info,uzver_api_crud=info,uzver_apub=info,uzver_db_queries=info,uzver_db_schema=info,uzver_db_views=info,uzver_db_views_actor=info,uzver_db_views_moderator=info,uzver_routes=info,uzver_utils=info,uzver_websocket=info"
    volumes:
      - ./uzver.hjson:/config/config.hjson
    depends_on:
      - postgres
      - pictrs

  uzver-ui:
    image: dessalines/uzver-ui:0.12.0
    ports:
      - "127.0.0.1:1235:1234"
    restart: always
    environment:
      - uzver_INTERNAL_HOST=uzver:8536
      - uzver_EXTERNAL_HOST=mypage.tech:8536
      - uzver_HTTPS=false
    depends_on: 
      - uzver

  pictrs:
    image: asonix/pictrs:v0.2.6-r2
    ports: 
      - "127.0.0.1:8537:8080"
    user: 991:991
    volumes:
      - ./volumes/pictrs:/mnt
    restart: always

From within the vps, the site opens fine through port 1235,
then I began to configure firewall rules and opened ports 1235 and 8536



, the site does not open. I checked both http and https and
looked into the project deployment tips and saw that I needed to configure nginx reverse proxy + attached a ready-made config which I used

/etc/nginx/sites-enabled/uszer.conf

limit_req_zone $binary_remote_addr zone=uzver_ratelimit:10m rate=1r/s;

server {
    listen 80;
    listen [::]:80;
    server_name mypage.tech;
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }
    location / {
        return 301 https://$host$request_uri;
    }
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name mypage.tech;

    ssl_certificate /etc/letsencrypt/live/mypage.tech/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/mypage.tech/privkey.pem;

    # Various TLS hardening settings
    # https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256';
    ssl_session_timeout  10m;
    ssl_session_cache shared:SSL:10m;
    ssl_session_tickets off;
    ssl_stapling on;
    ssl_stapling_verify on;

    # Hide nginx version
    server_tokens off;

    # Enable compression for JS/CSS/HTML bundle, for improved client load times.
    # It might be nice to compress JSON, but leaving that out to protect against potential
    # compression+encryption information leak attacks like BREACH.
    gzip on;
    gzip_types text/css application/javascript image/svg+xml;
    gzip_vary on;

    # Only connect to this site via HTTPS for the two years
    add_header Strict-Transport-Security "max-age=63072000";

    # Various content security headers
    add_header Referrer-Policy "same-origin";
    add_header X-Content-Type-Options "nosniff";
    add_header X-Frame-Options "DENY";
    add_header X-XSS-Protection "1; mode=block";

    # Upload limit for pictrs
    client_max_body_size 20M;

    # frontend
    location / {
      # The default ports:
      # uzver_ui_port: 1235
      # uzver_port: 8536

      set $proxpass "http://0.0.0.0:1235";
      if ($http_accept = "application/activity+json") {
        set $proxpass "http://0.0.0.0:8536";
      }
      if ($http_accept = "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"") {
        set $proxpass "http://0.0.0.0:8536";
      }
      if ($request_method = POST) {
        set $proxpass "http://0.0.0.0:8536";
      }
      proxy_pass $proxpass;

      rewrite ^(.+)/+$ $1 permanent;

      # Send actual client IP upstream
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    # backend
    location ~ ^/(api|pictrs|feeds|nodeinfo|.well-known) {
      proxy_pass http://0.0.0.0:8536;
      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "upgrade";

      # Rate limit
      limit_req zone=uzver_ratelimit burst=30 nodelay;

      # Add IP forwarding headers
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }


    # Redirect pictshare images to pictrs
    location ~ /pictshare/(.*)$ {
      return 301 /pictrs/image/$1;
    }

}

# Anonymize IP addresses
# https://www.supertechcrew.com/anonymizing-logs-nginx-apache/
map $remote_addr $remote_addr_anon {
  ~(?P<ip>\d+\.\d+\.\d+)\.    $ip.0;
  ~(?P<ip>[^:]+:[^:]+):       $ip::;
  127.0.0.1                   $remote_addr;
  ::1                         $remote_addr;
  default                     0.0.0.0;
}
log_format main '$remote_addr_anon - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" "$http_user_agent"';
access_log /var/log/nginx/access.log main;

The site is not visible on the Internet. What to do?