Yet another change in the file.

n8m/.env

@@ -1 +1,3 @@
+DOMAIN=example.com
+GENERIC_TIMEZONE=Europe/Warsaw
 PATH_TO_DATA=/home/user/docker/n8m

n8m/compose.yml

@@ -1,9 +1,15 @@
 services:
   n8n:
     image: docker.n8n.io/n8nio/n8n
-    container_name: n8n
     restart: unless-stopped
     ports:
-      - "5678:5678"
+      - ":5678:5678"
+    environment:
+      - N8N_HOST=${DOMAIN}
+      - N8N_PORT=5678
+      - N8N_PROTOCOL=https
+      - NODE_ENV=production
+      - WEBHOOK_URL=https://${DOMAIN}/
+      - GENERIC_TIMEZONE=${GENERIC_TIMEZONE}
     volumes:
       - ${PATH_TO_DATA}:/home/node/.n8n