added build tools

app.py

@@ -124,7 +124,11 @@ else:
     #os.system(f'echo "Installing xformers..."')
     #os.system(f"pip install --no-cache-dir xformers==0.0.25 --extra-index-url https://download.pytorch.org/whl/cu118")
 
-    # Building xformers
+    os.system(f'echo "Installing build dependencies..."')
+    os.system(f'pip install ninja packaging wheel')
+    os.system(f'apt-get update && apt-get install -y build-essential cmake git')
+    
+    # Building xformers from source
     os.system(f'echo "Cloning xformers repo..."')
     os.system(f'git clone https://github.com/facebookresearch/xformers.git  /home/user/app/xformers')