Better support healthcheck

[AdsonCicilioti]

Is your feature request related to a problem? Please describe.
On some Paas platforms when is deploy using this repo directly, no has a way to include some missing packages on node:slim image like curl and wget, generally used on healtcheck function.

Describe the solution you'd like
The solution is add a line on Dockerfile to instal these packages (curl and wget).

Describe alternatives you've considered
I recognize that this is not a problem. Anyone can fork this repo and tweak it for their needs, like I did. However, I believe that leaving this support behind could be interesting.

Additional context
I'll leave a Pull Request for this. Feel free to join or not.

[AdsonCicilioti]

Ah cara! agora que vi que o manager já está incluso na API... Foi mal