Create docker-compose file.

custom.ini

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+file_uploads = On
+memory_limit = 256M
+upload_max_filesize = 64M
+max_input_vars = 3000
+post_max_size = 64M
+max_execution_time = 600

default

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+server {
+	listen 80;
+	listen [::]:80;
+	server_name _;
+	return 301 https://$host$request_uri;
+}
+
+server {
+	listen 443 ssl http2 default_server;
+	listen [::]:443 ssl http2 default_server;
+
+	root /var/www/html/example;
+	index index.html index.htm index.php;
+
+	server_name _;
+
+	include /config/nginx/proxy-confs/*.subfolder.conf;
+
+	include /config/nginx/ssl.conf;
+
+	client_max_body_size 0;
+
+	location / {
+		try_files $uri $uri/ /index.php?$args @app;
+	}
+
+	location @app {
+		proxy_pass http://wordpress;
+		proxy_set_header Host $host;
+        	proxy_redirect off;
+        	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        	proxy_set_header X-Forwarded-Proto https;
+        	proxy_set_header X-Real-IP $remote_addr;
+	}
+
+}

docker-compose.yml

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+version: '3.3'
+
+services:
+
+  letsencrypt:
+    image: linuxserver/letsencrypt
+    container_name: letsencrypt
+    depends_on:
+      - wordpress
+    volumes:
+      - ./config:/config
+      - ./default:/config/nginx/site-confs/default
+    environment:
+      - EMAIL=email@example.com
+      - URL=www.example.com
+      - VALIDATION=http
+      - TZ=Europe/London
+      - PUID=500
+      - PGID=500
+    ports:
+      - "443:443"
+      - "80:80"
+
+  wordpress:
+    image: wordpress:latest
+    container_name: wordpress
+    hostname: wordpress
+    depends_on:
+      - db
+    restart: always
+    ports:
+      - "8080:80"
+    volumes:
+      - /var/www/html/example/wp-content:/var/www/html/wp-content
+      - /var/www/html/example/custom.ini:/usr/local/etc/php/conf.d/custom.ini
+    environment:
+      WORDPRESS_DB_HOST: db
+      WORDPRESS_DB_USER: wp_db_user
+      WORDPRESS_DB_PASSWORD: wp_db_pass
+      WORDPRESS_DB_NAME: wp_db_name
+      WORDPRESS_CONFIG_EXTRA: |
+        define( 'WP_MEMORY_LIMIT', '96M' );
+
+  db:
+    image: mysql:5.7
+    container_name: db
+    volumes:
+      - /var/lib/mysql:/var/lib/mysql
+    restart: always
+    ports:
+      - "3306:3306"
+    environment:
+      MYSQL_ROOT_PASSWORD: mysql_root_pass
+      MYSQL_DATABASE: wp_db_name
+      MYSQL_USER: wp_db_user
+      MYSQL_PASSWORD: wp_db_pass

wp-content/.gitkeep

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+