Update app.py

app.py

@@ -1,11 +1,5 @@
 import os
-os.system('wget https://www.python.org/ftp/python/3.9.7/Python-3.9.7.tgz')
-os.system('tar -xzf Python-3.9.7.tgz')
-os.system('cd Python-3.9.7')
-os.system('./configure --enable-optimizations')
-os.system('make -j 2')
-os.system('nproc')
-os.system('make altinstall')
+os.system('apt install python3.9')
 os.system('python3.9 --version')
 os.system('cat /etc/os-release')
 os.system('python -m pip install --upgrade pip')