remote-shutdown

Requirements

run the server
cd /path/to/server/ and install dependencies: npm install
run node ./server.js (ideally, add to startup apps)
install for example REST Client for Android
test it by sending DELETE requests to your computer's IP on port 9999
if needed, open port 9999 (just for local network) for instance by sudo iptables -A INPUT -p tcp --dport 9999 -j ACCEPT (ideally, save iptables permanently)
if needed, provide password to your script as a first command line paramater