Implement dynamic service rendering with Flask

Refactored the website to serve dynamic content using Flask, replacing static HTML pages. This allows for the centralized management of service data through a JSON file. Optimizations include:

- Added a .gitignore file to exclude Python and Flask-specific temporary files.
- Migrated static assets into an organized directory structure to facilitate Flask's static file serving.
- Removed redundant HTML files and created Flask template versions with dynamic content rendering.
- Introduced Caddy server configuration for the new Flask architecture, including headers for security and CORS policy, and reverse proxy settings for route handling.

With these changes, website maintenance and updates are simplified, allowing for service information to be updated in a single location (`services.json`), which then propagates to the user-facing pages automatically.

main.py

@@ -0,0 +1,23 @@
+from flask import Flask, render_template, send_from_directory
+from jinja2 import TemplateNotFound
+
+import json
+import pathlib
+
+app = Flask(__name__)
+
+@app.route('/assets/<path:path>')
+def send_assets(path):
+    return send_from_directory('assets', path)
+
+@app.route('/', defaults={'path': 'index'})
+@app.route('/<path:path>.html')
+def catch_all(path):
+    try:
+        services = json.loads((pathlib.Path(__file__).parent / "services.json").read_text())
+        return render_template(f'{path}.html', services=services)
+    except TemplateNotFound:
+        return "404 Not Found", 404
+
+if __name__ == '__main__':
+    app.run(port=9810)