Update page 'Day 8 homework - Karen'

Day 8 homework - Karen.md

@@ -0,0 +1,35 @@
+The original graph is shown below.
+
+![Original](https://gogs.gtsplab.com:5432/j/python-bootcamp/raw/Branch_Karen/original.png)
+
+We can use Flask in python to serve cat pictures as fast as possible, where Flask is used as the web framework to handle incoming HTTP requests.
+
+```
+import os
+from flask import Flask, Response
+from urllib.parse import urlparse
+
+app = Flask(__name__)
+
+@app.route('/')
+def index():
+    return 'Hello, welcome to the cat picture server!'
+
+@app.route('/<path:path>')
+def serve_jpeg(path):
+    if path.endswith('.jpg'):
+        file_path = path[1:]
+        if os.path.isfile(file_path):
+            with open(file_path, 'rb') as file:
+                return Response(file.read(), content_type='image/jpeg')
+        else:
+            return 'File not found', 404
+    else:
+        return 'Only .jpg files are allowed', 403
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=8000)
+```
+
+![Flask](https://gogs.gtsplab.com:5432/j/python-bootcamp/raw/Branch_Karen/flack.png)
+