Fix install.sh hanging on apt-get install

Add DEBIAN_FRONTEND=noninteractive to prevent dpkg from waiting
for interactive prompts during package configuration.

install.sh

@@ -28,8 +28,9 @@ echo "  CPU kill threshold: ${CPU_CYCLES} minutes of 95%+ CPU"
 echo "  RAM kill threshold: <${RAM_THRESHOLD}% free memory"
 echo ""
 
-# Install packages
+# Install packages (noninteractive to prevent hanging on prompts)
 echo "[1/8] Installing packages..."
+export DEBIAN_FRONTEND=noninteractive
 apt-get update -qq
 apt-get install -y -qq earlyoom monit