Ludwig Mey 4b33ac4bde Generalize code and improve documentation ...

Remove personal information and improve setup documentation:

**Code Generalization:**
- Updated .env.example with placeholder values
- Removed personal API keys and calendar IDs
- Removed all personal background images (15 images deleted)
- Added backgrounds directory README with usage instructions
- Updated .gitignore to exclude background images

**Documentation Improvements:**
- Added comprehensive Weather API setup instructions
  - How to get OpenWeatherMap API key
  - How to find location coordinates using LatLong.net
- Added detailed Google Calendar setup instructions
  - Public iCal feed method (easiest, no auth required)
  - Alternative Google Calendar API method
- Added background image specifications
  - Supported formats, recommended resolution
  - Where to add images and how to change rotation interval
- Added configuration section explaining all settings
  - Environment variables documentation
  - JavaScript intervals configuration
  - How to change image rotation time in both .env and app.js
- Added dynamic text color feature to feature list

**Setup Instructions Now Include:**
- Step-by-step Weather API key acquisition
- Google Calendar public iCal URL setup
- Background image guidelines and rotation configuration
- All configuration options clearly documented

Users can now easily set up their own calendar display without any personal information in the codebase.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

2026-02-16 22:36:17 +13:00

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