Remove version as it is not needed

docker-compose.yml

@@ -1,4 +1,3 @@
-version: '3.1'
 services:
   php-fpm:
     build: docker/php-fpm
@@ -10,7 +9,7 @@ services:
       - './docker/php-fpm/php-ini-overrides.ini:/usr/local/etc/php/conf.d/99-overrides.ini'
     ports:
       - '3000:3000'
-  
+
   nginx:
     image: 'nginx:1.23.3-alpine'
     working_dir: /var/www/html
@@ -19,7 +18,7 @@ services:
       - './docker/nginx/nginx.conf:/etc/nginx/conf.d/default.conf'
     ports:
       - '80:80'
-  
+
   mysql:
     image: 'mysql:8.0'
     volumes:
@@ -31,17 +30,16 @@ services:
       - MYSQL_PASSWORD=password
     ports:
       - '3306:3306'
-  
+
   phpmyadmin:
     image: 'phpmyadmin:5.2.1'
     ports:
       - '8080:80'
     environment:
       - 'PMA_HOST=mysql'
-  
+
   mailpit:
     image: 'axllent/mailpit:v1.7'
     ports:
       - '8025:8025'
       - '1025:1025'
-