🐳 Add Raspberry Pi Docker image

docker/images/n8n-rpi/Dockerfile

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+FROM arm32v7/node:12.16
+
+ARG N8N_VERSION
+
+RUN if [ -z "$N8N_VERSION" ] ; then echo "The N8N_VERSION argument is missing!" ; exit 1; fi
+
+RUN \
+	apt-get update && \
+	apt-get -y install graphicsmagick gosu
+
+RUN npm_config_user=root npm install -g full-icu n8n@${N8N_VERSION}
+
+ENV NODE_ICU_DATA /usr/local/lib/node_modules/full-icu
+ENV NODE_ENV production
+
+WORKDIR /data
+
+USER node
+
+CMD n8n

docker/images/n8n-rpi/README.md

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+## n8n - Raspberry PI Docker Image
+
+Dockerfile to build n8n for Raspberry PI.
+
+For information about how to run n8n with Docker check the generic
+[Docker-Readme](https://github.com/n8n-io/n8n/tree/master/docker/images/n8n/README.md)
+
+
+```
+docker build --build-arg N8N_VERSION=<VERSION> -t n8nio/n8n:<VERSION> .
+
+# For example:
+docker build --build-arg N8N_VERSION=0.43.0 -t n8nio/n8n:0.43.0-rpi .
+```
+
+```
+docker run -it --rm \
+  --name n8n \
+  -p 5678:5678 \
+  n8nio/n8n:0.70.0-rpi
+```