attempt at adding error pages

.env.sample

@@ -15,6 +15,9 @@ COMPOSE_FILE="compose.yml"
 # General settings                                                  #
 #####################################################################
 
+## Error pages
+COMPOSE_FILE="$COMPOSE_FILE:compose.error-pages.yml"
+
 ## Host-mode networking
 #COMPOSE_FILE="$COMPOSE_FILE:compose.host.yml"
 

compose.error-pages.yml

@@ -0,0 +1,36 @@
+version: '3.8'
+
+services:
+  error-pages:
+    image: tarampampam/error-pages:latest # Using the latest tag is highly discouraged. Please, use tags in X.Y.Z format
+    environment:
+      TEMPLATE_NAME: app-down
+    networks:
+      - proxy
+    deploy:
+      placement:
+        constraints:
+          - node.role == worker
+      labels:
+         - "traefik.enable=true"
+         - "traefik.docker.network=proxy"
+         - # use as "fallback" for any non-registered services (with priority below normal)
+         - "traefik.http.routers.error-pages-router.rule=HostRegexp(`{host:.+}`)"
+         - "traefik.http.routers.error-pages-router.priority=10"
+         - # should say that all of your services work on https
+         - "traefik.http.routers.error-pages-router.tls=true"
+         - "traefik.http.routers.error-pages-router.entrypoints=https"
+         - "traefik.http.routers.error-pages-router.middlewares=error-pages-middleware"
+         - "traefik.http.services.error-pages-service.loadbalancer.server.port=8080"
+         - # "errors" middleware settings
+         - "traefik.http.middlewares.error-pages-middleware.errors.status=400-599"
+         - "traefik.http.middlewares.error-pages-middleware.errors.service=error-pages-service"
+         - "traefik.http.middlewares.error-pages-middleware.errors.query=/{status}.html"
+
+  app:
+    deploy:
+      labels:
+        # next line is important
+        - "traefik.http.routers.${STACK_NAME}.middlewares=error-pages-middleware"
+        - "traefik.http.services.${STACK_NAME}.loadbalancer.server.port=80"
+