Fix interrupted dpkg state before apt-get

Run dpkg --configure -a before apt operations to recover from
any previously interrupted package installations.

install.sh

@@ -31,6 +31,7 @@ echo ""
 # Install packages (noninteractive to prevent hanging on prompts)
 echo "[1/8] Installing packages..."
 export DEBIAN_FRONTEND=noninteractive
+dpkg --configure -a 2>/dev/null || true  # Fix any interrupted dpkg state
 apt-get update -qq
 apt-get install -y -qq earlyoom monit