feat: initialize Flask proxy app with gitignore and license

- Added .gitignore to exclude virtual environment and Python cache files.
- Included MIT License to allow use, distribution, and modification.
- Implemented Flask app for proxying font requests to Google Fonts.
- Ensured specific headers are handled correctly to support CSS proxying.
- Added necessary dependencies in requirements.txt for Flask and requests.

This setup allows for efficient font request handling and helps establish project structure with appropriate licensing and dependency management.

.gitignore

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+venv/
+__pyache__/
+*.pyc

LICENSE

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+Copyright (c) 2024 Private.coffee Team <support@private.coffee>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

app.py

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+from flask import Flask, request, Response
+import requests
+import re
+
+app = Flask(__name__)
+
+FONT_STATIC_URL = 'https://fonts.gstatic.com'
+FONT_API_URL = 'https://fonts.googleapis.com'
+
+PATTERN = rb'fonts\.gstatic\.com'
+
+@app.route('/s/<path:path>', methods=['GET'])
+def proxy_fonts_static(path):
+    url = f"{FONT_STATIC_URL}/s/{path}"
+    response = requests.get(url, stream=True)
+
+    def generate():
+        for chunk in response.iter_content(chunk_size=8192):
+            yield chunk
+
+    # Remove hop-by-hop headers
+    headers = {key: value for key, value in response.headers.items() if key.lower() not in [
+        'connection', 'keep-alive', 'proxy-authenticate', 'proxy-authorization', 'te', 'trailers', 'transfer-encoding', 'upgrade']}
+    return Response(generate(), status=response.status_code, headers=headers)
+
+@app.route('/<path:path>', methods=['GET'])
+def proxy_fonts_api(path):
+    query_string = request.query_string.decode('utf-8')
+    url = f"{FONT_API_URL}/{path}"
+    if query_string:
+        url += f"?{query_string}"
+    headers = {key: value for (key, value) in request.headers.items() if key.lower() != 'host'}
+    headers['Accept-Encoding'] = ''  # Disable Accept-Encoding to avoid compressed responses
+
+    response = requests.get(url, headers=headers)
+    replacement = request.host.encode('utf-8')  # Convert the host to bytes for replacement
+
+    if 'text/css' in response.headers.get('Content-Type', ''):
+        content = response.content
+        content = re.sub(PATTERN, replacement, content)
+
+        headers = {key: value for key, value in response.headers.items() if key.lower() not in [
+            'connection', 'keep-alive', 'proxy-authenticate', 'proxy-authorization', 'te', 'trailers', 'transfer-encoding', 'upgrade']}
+        return Response(content, status=response.status_code, headers=headers)
+    else:
+        # For non-CSS content, return as is
+        headers = {key: value for key, value in response.headers.items() if key.lower() not in [
+            'connection', 'keep-alive', 'proxy-authenticate', 'proxy-authorization', 'te', 'trailers', 'transfer-encoding', 'upgrade']}
+        return Response(response.content, status=response.status_code, headers=headers)
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=5678)

requirements.txt

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+flask
+requests