Release v0.0.3 of Domain Locker

✨ New Features

• 3242f9d - Prevent add domain on demo (commit by @lissy93)
• 92dac8c - Endpoint to keep domains updated on self-hosted (commit by @lissy93)
• b1e12aa - Self-hosted endpouint for monitoring domain health (commit by @lissy93)
• 229e8de - Reverse feature names, so 'enable' instead of 'disable' (commit by @lissy93)
• cb1c99d - Home improvments (commit by @lissy93)
• 411b805 - Docker healthchecks (commit by @lissy93)
• 94b4b28 - Initial check script (commit by @lissy93)
• 9b3058d - Initial check script (commit by @lissy93)