feat: use traefik for loadbalancing

commit 384b118
    refactor: remove redundant ipv6 enablement in env

    * it is already enabled by default, as witnessed by this error message:
    10-listen-on-ipv6-by-default.sh: error: IPv6 listen already enabled

commit abfd7b2
    add: loadbalance using traefik

docker-compose.yml

@@ -1,23 +1,36 @@
 version: '3'
 services:
+  reverse-proxy:
+    image: traefik
+    command: --api=false --api.dashboard=false --providers.docker
+    networks:
+    - internal-nw
+    - default
+    ports:
+      - 127.0.0.1:1314:80
+    volumes:
+      # So that traefik can listen to the Docker events
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+
   homepage:
-    container_name: homepage
     build:
       context: .
     image: homepage
     networks:
-    - default
+    - internal-nw
     restart: unless-stopped
-    ports:
+    scale: 4
-      - "127.0.0.1:1314:80"
-    environment:
-      - ENABLE_IPV6=true
-    volumes:
-      - "/var/run/docker.sock:/tmp/docker.sock:ro"
     labels:
-      "homepage": "true"
+      - traefik.enable=true
+      - traefik.http.services.homepage.loadbalancer.server.port=80
+      - traefik.http.routers.homepage.rule=Host(`localhost`)
     logging:
       driver: json-file
       options:
         max-size: "5m"
         max-file: "5"
+
+networks:
+  internal-nw:
+    internal: true
+  default: