add n8n

n8n/README.md

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+n8n
+===
+
+[n8n][1] (pronounced n-eight-n) helps you to interconnect every app with an API in
+the world with each other to share and manipulate its data without a single
+line of code.
+
+[1]: https://n8n.io/

n8n/arm/docker-compose.yml

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+version: "3.8"
+services:
+  n8n:
+    image: n8nio/n8n:latest-rpi
+    ports:
+      - "5678:5678"
+    volumes:
+      - ./data:/root/.n8n
+    restart: unless-stopped

n8n/docker-compose.yml

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+version: "3.8"
+services:
+  n8n:
+    image: n8nio/n8n
+    ports:
+      - "5678:5678"
+    volumes:
+      - ./data:/root/.n8n
+    restart: unless-stopped