chore: add traefik deployment and config generation

roles/reverseproxy/templates/traefik.yml.j2

@@ -0,0 +1,42 @@
+{% if enable_dashboard %}
+api:
+  dashboard: true
+  insecure: true
+{% endif %}
+
+entryPoints:
+  web:
+    address: ":80"
+{% if use_ssl %}
+    http:
+      redirections:
+        entryPoint:
+          to: websecure
+          scheme: https
+{% endif %}
+  websecure:
+    address: ":443"
+
+providers:
+{% if use_static_services | default(false) %}
+  file:
+    filename: /etc/traefik/services.yml
+    watch: true
+{% endif %}
+{% if use_docker_provider | default(true) %}
+  docker:
+    endpoint: "unix:///var/run/docker.sock"
+    exposedByDefault: false
+{% endif %}
+
+certificatesResolvers:
+  letsencrypt:
+    acme:
+      email: admin@digitalboard.ch
+      storage: /letsencrypt/acme.json
+      httpChallenge:
+        entryPoint: web
+
+global:
+  checkNewVersion: false
+  sendAnonymousUsage: false