Pass WP version to docker-compose as ENV var (https://github.com/woocommerce/woocommerce-blocks/pull/2683)

* Pass WP version to docker-compose as ENV var

* change to 5.3

* rename to WP_VERSION to match unit-tests

plugins/woocommerce-blocks/.env

@@ -12,3 +12,4 @@ WORDPRESS_TITLE=WooCommerce Core E2E Test Suite
 WORDPRESS_LOGIN=admin
 WORDPRESS_PASSWORD=password
 WORDPRESS_EMAIL=admin@woocommercecoree2etestsuite.com
+WP_VERSION=5.4

plugins/woocommerce-blocks/bin/docker/wordpress/Dockerfile

@@ -1 +1,2 @@
-FROM wordpress:5.4
+ARG WP_VERSION
+FROM wordpress:${WP_VERSION}

plugins/woocommerce-blocks/docker-compose.yml

@@ -1,7 +1,6 @@
-version: '3.3'
+version: "3.3"
 
 services:
-
   db:
     image: mariadb:10.5
     restart: on-failure
@@ -9,10 +8,10 @@ services:
       MYSQL_DATABASE: wordpress
       MYSQL_USER: wordpress
       MYSQL_PASSWORD: wordpress
-      MYSQL_RANDOM_ROOT_PASSWORD: 'yes'
+      MYSQL_RANDOM_ROOT_PASSWORD: "yes"
     volumes:
-    - db:/var/lib/mysql
-    
+      - db:/var/lib/mysql
+
   wordpress-unit-tests:
     container_name: wordpress_test
     depends_on:
@@ -31,7 +30,7 @@ services:
       WP_CORE_DIR: /var/www/html
       WP_TESTS_DIR: /tmp/wordpress-tests-lib
     volumes:
-      - './:/var/www/html/wp-content/plugins/woocommerce-gutenberg-products-block'
+      - "./:/var/www/html/wp-content/plugins/woocommerce-gutenberg-products-block"
       - wordpress:/var/www/html
 
   wordpress-www:
@@ -39,6 +38,8 @@ services:
       - db
     build:
       context: ./bin/docker/wordpress
+      args:
+        WP_VERSION: ${WP_VERSION}
     ports:
       - ${WORDPRESS_PORT}:80
     restart: on-failure
@@ -58,16 +59,16 @@ services:
       - db
       - wordpress-www
     build:
-        context: ./bin/docker/wp-cli
+      context: ./bin/docker/wp-cli
     restart: on-failure
     environment:
-        WORDPRESS_HOST:
-        WORDPRESS_TITLE:
-        WORDPRESS_LOGIN:
-        WORDPRESS_PASSWORD:
-        WORDPRESS_PORT:
-        WORDPRESS_EMAIL:
-        DOMAIN_NAME:
+      WORDPRESS_HOST:
+      WORDPRESS_TITLE:
+      WORDPRESS_LOGIN:
+      WORDPRESS_PASSWORD:
+      WORDPRESS_PORT:
+      WORDPRESS_EMAIL:
+      DOMAIN_NAME:
     volumes:
       - ./:/var/www/html/wp-content/plugins/woocommerce-gutenberg-products-block
       - wordpress:/var/www/html