moves n8n config to .env file and adds mail config

docker_compose_applications/n8n/.env.example

@@ -0,0 +1,15 @@
+GENERIC_TIMEZONE=
+N8N_HOST=
+N8N_PORT=
+N8N_PROTOCOL=
+NODE_ENV=
+WEBHOOK_URL=
+
+# Mail setup
+N8N_EMAIL_MODE=
+N8N_SMTP_HOST=
+N8N_SMTP_PORT=
+N8N_SMTP_USER=
+N8N_SMTP_PASS=
+N8N_SMTP_SENDER=
+N8N_SMTP_SSL=

docker_compose_applications/n8n/compose.yaml

@@ -7,13 +7,8 @@ services:
     image: docker.n8n.io/n8nio/n8n
     container_name: n8n
     restart: unless-stopped
-    environment:
-      - GENERIC_TIMEZONE=Europe/Berlin
-      - N8N_HOST=n8n.consider-funding.de
-      - N8N_PORT=5678
-      - N8N_PROTOCOL=https
-      - NODE_ENV=production
-      - WEBHOOK_URL=https://n8n.consider-funding.de/
+    env_file:
+      - .env
     volumes:
       - /ansible_docker_compose/project_data/n8n/data:/home/node/.n8n
       - /ansible_docker_compose/project_data/n8n/files:/files