build: add more environment variables for Docker

.docker.env.example

@@ -2,3 +2,9 @@ MYSQL_DATABASE=drupal
 MYSQL_PASSWORD=drupal
 MYSQL_ROOT_PASSWORD=root
 MYSQL_USER=drupal
+
+# DOCKER_MYSQL_VOLUME=./db-data:/var/lib/mysql
+DOCKER_MYSQL_VOLUME=mysql_data:/var/lib/mysql
+
+# DOCKER_WEB_PORT=80
+DOCKER_WEB_PORT=127.0.0.1:80

docker-compose.yaml

@@ -19,7 +19,7 @@ services:
       php:
         condition: service_started
     ports:
-      - 80:80
+      - "${DOCKER_WEB_PORT:-127.0.0.1:80}:80"
     restart: unless-stopped
 
   php:
@@ -40,7 +40,7 @@ services:
   mysql:
     image: mariadb:10
     volumes:
-      - mysql_data:/var/lib/mysql
+      - "${DOCKER_MYSQL_VOLUME:-./db-data:/var/lib/mysql}"
       - ./tools/assets/development:/docker-entrypoint-initdb.d
     env_file:
       - .docker.env