Add file provider to Traefik for host-based services

Enable dual provider support (Docker + File) to allow routing both containerized services and services running on the host machine. Add dynamic.yml with routes for nginx-based websites (agence66.fr, walter-coiffure.fr) pointing to host gateway IP.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

dynamic.yml

@@ -0,0 +1,23 @@
+http:
+  routers:
+    walter-coiffure:
+      rule: "Host(`walter-coiffure.fr`) || Host(`www.walter-coiffure.fr`)"
+      entryPoints:
+        - websecure
+      service: nginx-host
+      tls:
+        certResolver: letsencrypt
+
+    agence66:
+      rule: "Host(`agence66.fr`) || Host(`www.agence66.fr`)"
+      entryPoints:
+        - websecure
+      service: nginx-host
+      tls:
+        certResolver: letsencrypt
+
+  services:
+    nginx-host:
+      loadBalancer:
+        servers:
+          - url: "http://172.19.0.1:8081"