Buat fungsi parseComposeServices(yaml) yang menerima string simplified YAML (format key-value sederhana) dan mengembalikan array nama service.

Input format (setiap service dipisah baris kosong):

service: app
image: node:20
port: 3000

service: db
image: postgres:16
port: 5432

Return array nama service: ["app", "db"]

Hint

• Docker Compose mendefinisikan multi-container app dalam satu file.
• Parse services dari format YAML sederhana.
• service: web image:node → { name: "web", image: "node" }