[BUG] must be a mapping

[az-z]

Expected Behavior

hello,
thank you for the project!

Expected behavior :
expect to have docker-compose converted into k3s/k8s deployment file

Actual Behavior

Steps To Reproduce

curl -L https://github.com/kubernetes/kompose/releases/download/v1.35.0/kompose-linux-amd64 -o ~/bin/kompose && chmod +x ~/bin/kompose

cd playground
kompose -f docker-compose.yml convert

Kompose Version

kompose version
1.35.0 (9532ceef3)

Docker-Compose file

services:

  vault-agent:
    build:
      context: .
      dockerfile: vault_agent/Dockerfile
    depends_on:
      vault: service_started

  vault:
    image: hashicorp/vault:latest

Anything else?

I chopped down the compose file just to be able to reproduce the conversion error.