add missing dash

Author: klemenfn

server/docker/entrypoint_flare.sh

@@ -61,5 +61,5 @@ fi
 	--log-level="$LOG_LEVEL" \
 	--network-id="$NETWORK_ID" \
 	--api-keystore-enabled=true \
-	-http-allowed-hosts="$HTTP_ALLOWED_HOSTS" \
+	--http-allowed-hosts="$HTTP_ALLOWED_HOSTS" \
 	"$EXTRA_ARGUMENTS"