Minimal systemd unit

whatever.service

# place in /etc/systemd/system/whatever.service and install with `systemd install whatever.service`
# note that if you change this file you will need to run `systemctl daemon-reload` to get systemd to notice
[Unit]
Description=A good service description

# After networking because we need that
After=network.target

[Service]

# Simple services don't do any forking / background nonsence
Type=simple

# User with which to run the service
User=pi

# Any setup we need to do, specifying the shell because otherwise who knows what's up
ExecStartPre=/bin/bash -c 'echo "hello world"'

# Set the working directory for the application
WorkingDirectory=/my_app/

# Command to run the application
ExecStart=/my_app/my_app.bin

# Restart policy, only on failure
Restart=on-failure

[Install]
# Start the service before we get to multi-user mode
WantedBy=multi-user.target