Update Dockerfile to be less painful; Set JABY_ENGINE_PATH automatically

podman/scripts/install_rust.sh

@@ -1,4 +1,7 @@
 #!/bin/bash
+echo "<<< Install Rust prerequisites >>>"
+apt install -y curl
+
 echo "<<< Install Rust >>>"
 curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
 . "$HOME/.cargo/env"