Use environment variable in an Nginx container using templating

docker-compose.yml

version: "3"
services: 
  vhostfront:
    image: repository/vhostmon/vhostfront:latest
    environment:
      - APP_CONF=config={"baseUrl":"http://localhost:8081"}
    ports:
      - "8085:80"
    command: ["sh", "-c", "envsubst < /etc/nginx/conf.d/deafault.conf.template > /etc/nginx/conf.d/default.conf && nginx -g 'daemon off;'"]