feat: User service ports Traefik Docker labels

[laurentluce]

Description:

As part of the authenticated public http ports feature, we are bringing Traefik inside the Docker cluster to route HTTP traffic to the user service HTTP ports. This PR sets the required Docker labels.

This was tested with Traefik running inside the engine enclave with the following static config and the user service enclave network added to the Traefik container list of networks.

version: '3'

services:
  reverse-proxy:
    image: traefik:v2.10
    # Enables the web UI and tells Traefik to listen to docker
    command:
      - --accesslog=true
      - --api.debug=true
      - --api.insecure=true
      - --api.dashboard=true
      - --api.disabledashboardad=true
      - --providers.docker
      - --entrypoints.web.address=:8000
      - --providers.docker.network=bridge
      - --providers.docker.exposedByDefault=false
      - --log.level=DEBUG
    ports:
      # The HTTP port
      - "8000:8000"
      # The Web UI (enabled by --api.insecure=true)
      - "8080:8080"
    volumes:
      # So that Traefik can listen to the Docker events
      - /var/run/docker.sock:/var/run/docker.sock

User service "nginx" port labels:
Enclave short UUID: 65d2fb6d6732
Service short UUID: 3771c85af16a
HTTP Port number: 80

"traefik.enable": "true"
"traefik.http.routers.65d2fb6d6732-3771c85af16a-80.rule": "Host(`80-3771c85af16a-65d2fb6d6732`)"
"traefik.http.routers.65d2fb6d6732-3771c85af16a-80.service": "65d2fb6d6732-3771c85af16a-80"
"traefik.http.services.65d2fb6d6732-3771c85af16a-80.loadbalancer.server.port": "80"

$ curl -I http://localhost:8000 -H "Host: 80-3771c85af16a-65d2fb6d6732"
HTTP/1.1 200 OK
Accept-Ranges: bytes
Content-Length: 615
Content-Type: text/html
Date: Wed, 29 Nov 2023 21:32:51 GMT
Etag: "6537cac7-267"
Last-Modified: Tue, 24 Oct 2023 13:46:47 GMT
Server: nginx/1.25.

Is this change user facing?

NO

References (if applicable):

https://www.notion.so/kurtosistech/Public-user-service-HTTP-ports-bdf1107b0d1c4ca990c346fd87473174