try fix python not found error

entrypoint.sh

@@ -6,7 +6,7 @@ if [ ! -f "/stable-diffusion/.installed" ]; then
     echo "Installing ComfyUI..."
     git clone https://github.com/comfyanonymous/ComfyUI.git /stable-diffusion
     cd /stable-diffusion
-	pip install -r requirements.txt
+	pip3 install -r requirements.txt
 
     cd /stable-diffusion/custom_nodes
 
@@ -22,12 +22,12 @@ elif [ ! -f "/stable-diffusion/custom_nodes/ComfyUI-Manager/__init__.py" ]; then
 
     git fetch https://github.com/comfyanonymous/ComfyUI.git
     git pull
-    pip install -r requirements.txt
+    pip3 install -r requirements.txt
 fi;
 
 echo "Set permissions..."
 chown -R user:user /stable-diffusion
 
 cd /stable-diffusion
 echo "Starting ComfyUI..."
-python -u main.py --listen --port 5555 ${CLI_ARGS}
+python3 -u main.py --listen --port 5555 ${CLI_ARGS}