Create RANDFILE if it does not exist

scripts/bin/docker-foreground-cmd

@@ -38,6 +38,12 @@ unset UNPRIVILEGED_USER_PASSWORD
 # Dump environment variables
 export-env >> /etc/profile.d/env.sh
 
+# Create RANDFILE if it does not exist
+RANDFILE=${RANDFILE-${HOME}/.rnd}
+if [ ! -f "${RANDFILE}" ]; then
+	dd if=/dev/urandom of="${RANDFILE}" bs=256 count=1 >/dev/null 2>&1
+fi
+
 # Generate self-signed certificate
 if [ ! -f "${RDP_TLS_KEY_PATH:?}" ] || [ ! -f "${RDP_TLS_CERT_PATH:?}" ]; then
 	KEY_FILE=${RDP_TLS_KEY_PATH:?}