feat: error pages

See coop-cloud/organising#115 (comment).

compose.yml

@@ -49,6 +49,23 @@ services:
         - "traefik.http.routers.traefik.middlewares=security@file"
         - "coop-cloud.${STACK_NAME}.version=1.0.0+v2.5.2"
 
+  web:
+    image: tarampampam/error-pages:2.2.0
+    environment:
+      - TEMPLATE_NAME=shuffle
+    networks:
+      - proxy
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.services.error-pages-service.loadbalancer.server.port=8080"
+      - "traefik.http.routers.error-router.entrypoints=web-secure"
+      - "traefik.http.routers.error-router.rule=HostRegexp(`{host:.+}`)"
+      - "traefik.http.routers.error-router.priority=10"
+      - "traefik.http.routers.error-router.middlewares=error-pages-middleware@docker"
+      - "traefik.http.middlewares.error-pages-middleware.errors.status=400-599"
+      - "traefik.http.middlewares.error-pages-middleware.errors.service=error-pages-service@docker"
+      - "traefik.http.middlewares.error-pages-middleware.errors.query=/{status}.html"
+
 networks:
   proxy:
     external: true