Update script for n8n Docker container

#!/bin/bash

###
### Context of this script can be found in the following reddit thread
### https://www.reddit.com/r/ServerAvatar/comments/uco5cg/how_to_run_selfhosted_docker_instance_of_n8n_on_a/
###

# Get the container image ID for the current instance
cid=$(docker ps -a -q  --filter ancestor=n8nio/n8n)

# If $cid is empty then there doesn't exist
# a prior instance to stop and remove, and
# therefore we can skip these operations...
if [ ! -z "$cid" ]
then
        echo "Container Instance ID: $cid"

        echo "Stopping Instance..."
        docker stop $cid

        echo "Removing Instance..."
        docker rm $cid
fi

# ... and proceed directly to pulling the latest version of n8n
echo "Pulling Latest Image..."
docker pull n8nio/n8n

echo "Launching New Instance..."
docker run -d --restart=always --name n8n  -p 5678:5678 \
    --env-file /home/n8n.io/n8nio/.env \
    -v /home/n8n.io/n8nio/.n8n:/home/node/.n8n n8nio/n8n