About updating new node version it is in README.md and create-from-scratch.md
# after Terminal 1 ./build-docker is finished
./run
./make-linksys-wrt
# no execute Terminal 3
docker push patrikx3/openwrt-insomnia:latest
docker commit CONTAINER_ID patrikx3/openwrt-insomnia:linksys-wrt
docker push patrikx3/openwrt-insomnia:linksys-wrt