Doubt in Labbs : Docker compose last question

Docker
#1

Screenshot 2021-03-15 at 10.52.49 AM

services:
 db:
   environment:
     POSTGRES_PASSWORD: mysecretpassword
   image: postgres
 wordpress:
   image: wordpress
   links:
   - db
   ports:
   - 8085:80
version: '3.0'
#2

Check:

check

#3

You need to delete “dot” in the docker-compose command.

#4

Some people make mistakes because when open hint they see ‘dot’ at the end of commands.