Add health status check

[ThalesC]

First of all, I dumped Portainer as soon as I found out about Dockge, but I am missing the health status.

This pull request results in the following picture, where:

• basic-server doesn't have a healthcheck
• healthy-server has a healthcheck with a test set to be healthy
• unhealthy-server has a healthcheck with a test set to be unhealthy

Compose used on example;

version: "3.3"
services:
  basic-server:
    image: nginx:alpine
  healthy-server:
    image: nginx:alpine
    healthcheck:
      test:
        - CMD
        - ls
        - /etc
      interval: 1s
      timeout: 1s
      retries: 0
      start_period: 1s
  unhealthy-server:
    image: nginx:alpine
    healthcheck:
      test:
        - CMD
        - ls
        - /nope
      interval: 1s
      timeout: 1s
      retries: 0
      start_period: 1s
networks: {}

Just an initial idea, happy to discuss!