Can I use environment variables?

[mcauto]

docker-compose.yml

version: '3'
services:
  nginx:
    image: nginx
    hostname: ${PROJECT_NAME}-nginx
    container_name: ${PROJECT_NAME}-nginx
  app:
    image: myapp
    hostname: ${PROJECT_NAME}-myapp
    container_name: ${PROJECT_NAME}-myapp
  mysql:
    image: mysql:5.7
    hostname: ${PROJECT_NAME}-mysql
    container_name: ${PROJECT_NAME}-mysql
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    ports:
      - ${MYSQL_PORT}:3306
    env_file:
      - confs/database/mysql/.env
    volumes:
      - mysql-storage:/var/lib/mysql

.envrc

export PROJECT_NAME=$(echo "${PWD##*/}")
export MYSQL_PORT=3306

Can I use environment variable in this plugin?