mybb-docker-compose.yml

version: '3.7'
services:
  mybb:
    image: mybb/mybb:1.8.22
    environment:
    restart: on-failure
    volumes:
    - ${PWD}/mybb:/var/www/html

  nginx:
    image: nginx:mainline-alpine
    ports:
    - 80:80/tcp
    restart: on-failure
    volumes:
    - ${PWD}/nginx:/etc/nginx/conf.d:ro
    - ${PWD}/mybb:/var/www/html:rw

  postgresql:
    image: postgres:12.1-alpine
    environment:
      POSTGRES_DB: mybb
      POSTGRES_USER: mybb
      POSTGRES_PASSWORD: changeme
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U mybb"]
      interval: 30s
      timeout: 30s
      retries: 3
    restart: on-failure
    volumes:
    - ${PWD}/postgres/data:/var/lib/postgresql/data

mybb-nginx.conf

upstream mybb {
    server mybb:9000 weight=5;
}

server {
    listen 80;
 
    root /var/www/html;
    index index.html index.php;

    location / {
        try_files $uri $uri/ /index.php?$args;
    }

    location ~ inc/ {
        internal;
    }

    location ~ ^/(images|cache|jscripts|uploads)/ {
        access_log off;
    }

    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass mybb;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
    }
}