use service name as service ID

[nakaakist]

Resolves #402

test

run the built lazydocker binary with the following docker-compose.yml file, and confirmed that the selected service does not move.

version: "3.9"
services:
  service-a:
    image: "nginx:latest"
  service-b:
    image: "nginx:latest"
  service-c:
    image: "nginx:latest"

Screen.Recording.2022-11-24.at.0.41.30.mov

[jesseduffield]

nice work @nakaakist !