Created Update Script for Systemd (Ombi v3) (markdown)

Update-Script-for-Systemd-(Ombi-v3).md

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+### Systemd (Ubuntu based distros)
+
+**Create the Ombi update script**
+       
+    nano ~/update_ombi.sh
+
+**Paste in the following code (right click if using terminal)**
+```
+#!/bin/bash
+installdir="/opt/ombi"
+
+unzip-strip() (
+    local zip=$1
+    local dest=${2:-.}
+    local temp=$(mktemp -d) && tar -zxf "$zip" -C "$temp" && mkdir -p "$dest" &&
+    shopt -s dotglob && local f=("$temp"/*) &&
+    if (( ${#f[@]} == 1 )) && [[ -d "${f[0]}" ]] ; then
+        cp -r "$temp"/*/* "$dest"
+    else
+        cp -r "$temp"/* "$dest"
+    fi && rm -rf "$temp"/* "$temp"
+)
+echo "Downloading Ombi update..."
+json=$(curl -sL https://ci.appveyor.com/api/projects/tidusjar/requestplex)
+jobId=$(grep -Po '(?<="jobId":")([^"]+)' <<<  "$json")
+version=$(grep -Po '(?<="version":")([^"]+)' <<<  "$json")
+file=ombi_$version.tar.gz
+size=$(curl -sL https://ci.appveyor.com/api/buildjobs/$jobId/artifacts | grep -Po '(?<="linux.tar.gz","type":"File","size":)(\d+)')
+wget --quiet -O $file https://ci.appveyor.com/api/buildjobs/$jobId/artifacts/linux.tar.gz
+echo Version $version downloaded...checking file size
+if [ $(wc -c < $file) != $size ]; then
+        echo "Downloaded file size does not match expected file size...bailing!"
+        exit 1
+fi
+echo "File size validated...stopping Ombi..."
+systemctl stop ombi.service
+echo "Ombi stopped...installing update..."
+unzip-strip $file $installdir
+echo "Update installed...starting Ombi"
+sudo systemctl start ombi.service
+echo "Ombi started...cleaning up..."
+rm -f $file
+echo "Update complete"
+```
+> Note: Set installdir to your Ombi installation directory.
+
+Press <kbd>Ctrl</kbd>+<kbd>X</kbd> then <kbd>y</kbd> to save (assuming you're using nano).
+
+Make it executable
+
+```
+chmod +x ~/update_ombi.sh 
+```
+
+When an update is provided for Ombi simply run
+
+```
+sudo ./update_ombi.sh
+```