Add Traefik reverse proxy configuration with Docker provider

Set up Traefik v3.2 with Docker label-based routing, Let's Encrypt SSL certificates, and configuration examples for multiple services including dashboard, Nextcloud, Portainer, and other applications.

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

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

traefik.yml

@@ -0,0 +1,27 @@
+api:
+  dashboard: true
+
+entryPoints:
+  web:
+    address: ":80"
+    http:
+      redirections:
+        entryPoint:
+          to: websecure
+          scheme: https
+websecure:
+  address: ":443"
+
+certificatesResolvers:
+  letsencrypt:
+    acme:
+      email: votre@email.com
+      storage: acme.json
+      httpChallenge:
+        entryPoint: web
+
+providers:
+  docker:
+    endpoint: "unix:///var/run/docker.sock"
+    exposedByDefault: false
+    network: traefik-net