Update app.py

app.py

@@ -42,7 +42,8 @@ if not os.path.exists(setup_flag):
     install_with_subprocess([sys.executable,'-m','pip','install','-q','--editable','./'])
     os.chdir('..')
 
-    subprocess.run(['apt-get', 'install', '-y', 'libsndfile1-dev', 'ffmpeg'],check=True)
+    subprocess.run(['apt-get', 'update'], check=True)
+    subprocess.run(['apt-get', 'install', '-y', 'libsndfile1-dev', 'ffmpeg'], check=True)
     
     os.system('git clone https://github.com/gokulkarthik/TTS')
     os.chdir('TTS')