feat: replace redirect with proxy content fetching

Modified the proxy route to fetch and return the content directly from the target URL instead of redirecting. This change leverages `urlopen` to read the response and send its content back to the client, enhancing user experience by keeping them on the same page and avoiding potential CORS issues.

app.py

@@ -1,4 +1,6 @@
-from flask import Flask, redirect, render_template, request
+from flask import Flask, render_template, request
+
+from urllib.request import urlopen
 
 app = Flask(__name__)
 
@@ -10,7 +12,11 @@ def home():
 @app.route('/<path:url>')
 def proxy(url):
     jsdelivr_url = f'https://cdnjs.cloudflare.com/{url}'
-    return redirect(jsdelivr_url)
+
+    response = urlopen(jsdelivr_url)
+    content = response.read()
+
+    return content
 
 if __name__ == '__main__':
     app.run()