Revert cmd.sh to manage python runtimes

Author: AlexisNo

cmd.sh

@@ -1,4 +1,10 @@
 #!/bin/bash
 set -e
 
-su $DEFAULT_USER -c "npm install --production"
+if [ "$RUNTIME" == "python" ] || [ "$RUNTIME" == "python2" ] || [ "$RUNTIME" == "python2.7" ]; then
+    su $DEFAULT_USER -c "pip install --requirement requirements.txt --upgrade --target ."
+elif [ "$RUNTIME" == "python3" ] || [ "$RUNTIME" == "python3.6" ] || [ "$RUNTIME" == "python3.7" ]; then
+    su $DEFAULT_USER -c "pip3 install --requirement requirements.txt --upgrade --target ."
+else
+    su $DEFAULT_USER -c "npm install --production"
+fi