Additional property app is not allowed

[Villiem]

It seems docker-compose.yml uses docker version 1 which has been deprecated.
V2 and up require a version line at the top.

version: "3.9" # optional since v1.27.0
services:
web:
build: .
ports:
- "8000:5000"
volumes:
- .:/code
- logvolume01:/var/log
depends_on:
- redis
redis:
image: redis
volumes:
logvolume01: {}

My suggestion is to update de .yml to version 2 :D