Move traefik log into external mount point

roles/traefik/templates/config/traefik.yml.j2

@@ -1,9 +1,11 @@
-log:
-  level: DEBUG
-
 api:
   dashboard: true
 
+log:
+  filePath: "/var/log/traefik/traefik.log"
+  format: json
+  level: INFO
+
 accessLog:
   filePath: "/var/log/traefik/access.log"
   format: json

roles/traefik/templates/docker-compose.yml.j2

@@ -18,6 +18,7 @@ services:
       - ./config/traefik.yml:/traefik.yml:ro
       - {{ server.work_dir }}/traefik/base/acme.json:/acme.json:rw
       - {{ server.work_dir }}/traefik/base/access.log:/var/log/traefik/access.log:rw
+      - {{ server.work_dir }}/traefik/base/traefik.log:/var/log/traefik/traefik.log:rw
       - /etc/timezone:/etc/timezone:ro
       - /etc/localtime:/etc/localtime:ro
     extra_hosts: