kms: Add venv.sh

Author: kvinwang

kms/dstack-app/venv.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+if [ -f ".venv/bin/activate" ]; then
+    source .venv/bin/activate
+else
+    python3 -m venv .venv
+    source .venv/bin/activate
+    pip install requests eth_keys cryptography
+fi