Conform Compose file to Compose Specification

docker-compose.yml

@@ -1,26 +0,0 @@
----
-version: '3'
-services:
-  umami:
-    image: ghcr.io/umami-software/umami:postgresql-latest
-    ports:
-      - "3000:3000"
-    environment:
-      DATABASE_URL: postgresql://umami:umami@db:5432/umami
-      DATABASE_TYPE: postgresql
-      HASH_SALT: replace-me-with-a-random-string
-    depends_on:
-      - db
-    restart: always
-  db:
-    image: postgres:12-alpine
-    environment:
-      POSTGRES_DB: umami
-      POSTGRES_USER: umami
-      POSTGRES_PASSWORD: umami
-    volumes:
-      - ./sql/schema.postgresql.sql:/docker-entrypoint-initdb.d/schema.postgresql.sql:ro
-      - umami-db-data:/var/lib/postgresql/data
-    restart: always
-volumes:
-  umami-db-data: