feat(docker-env2): add Traefik load-balancer config

docker-env2/traefik/dynamic.yml

@@ -0,0 +1,18 @@
+http:
+  routers:
+    central:
+      rule: "PathPrefix(`/`)"
+      service: central
+      entryPoints:
+        - web
+
+  services:
+    central:
+      loadBalancer:
+        healthCheck:
+          path: /health/active
+          interval: 5s
+          timeout: 3s
+        servers:
+          - url: "http://scadalink-env2-central-a:5000"
+          - url: "http://scadalink-env2-central-b:5000"

docker-env2/traefik/traefik.yml

@@ -0,0 +1,11 @@
+entryPoints:
+  web:
+    address: ":80"
+
+api:
+  dashboard: true
+  insecure: true
+
+providers:
+  file:
+    filename: /etc/traefik/dynamic.yml