v1.13.1 - The "open me up" update

• Adds support for a headless environment
• Makes it open the browser if the port is already in use (hopefully signaling the App is already running)

Small one, but still a QOL improvement I think

What's Changed

• Headless by @aless2003 in #154
• Open on running feature by @aless2003 in #155

Full Changelog: v1.13.0...v1.13.1