Added Docker API

[pruizlezcano]

Use docker-compose labels to populate Flame dashboard as described in #14.
When the client fetch /api/apps, the server calls the docker socket and manage the apps in the dashboard.

I've never use Typescript before, so maybe it can be done in a better way rather inside the getApps function.

[NoLooseEnds]

Is it possible to have multiple on the same label ie.

- flame.app1.type=application # "app" works too
- flame.app1.name=Appname
- flame.app1.url=https://appname.${TRAEFIK_BASE_DNS}
- flame.app1.icon=docker # Optional, default is "docker"
- flame.app2.type=application # "app" works too
- flame.app2.name=Appname2
- flame.app2.url=https://appname2.${TRAEFIK_BASE_DNS}
- flame.app2.icon=docker # Optional, default is "docker"