raspberry pi4 8gb with docker . need support for create image or deploy all

i try deploy on my raspberry pi 4 8gb

uname -a
Linux raspberrypi 5.10.92-v8+ #1514 SMP PREEMPT Mon Jan 17 17:39:38 GMT 2022 aarch64 GNU/Linux

with docker

root@raspberrypi:/openwrt# docker -v
Docker version 20.10.12, build e91ed57

but i dont undestand the procedure because i clone git and execute

/docker-build.sh $VERSION=21.02.1 $TARGET=aarch64_generi $DOCKER_USER=admin $DOCKER_PASS=admin

• cp '' ./build/Dockerfile
  cp: impossibile eseguire stat di '': File o directory non esistente

but nothing

i try with

root@raspberrypi:/openwrt# docker run --rm -it openwrtorg/aarch64_generic
Unable to find image 'openwrtorg/aarch64_generic:latest' locally
docker: Error response from daemon: pull access denied for openwrtorg/aarch64_generic, repository does not exist or may require 'docker login': denied: requested access to the resource is denied.
See 'docker run --help'.

but nothing

can help me

Start with docker-build.sh and the build/Dockerfile referenced by the report, then reproduce the command on the stated Raspberry Pi and Docker versions. Determine the expected inputs for image creation and deployment, and verify that the documented procedure produces a usable image without the reported missing-file and pull-access errors.