Agent Dockerfile uses non-existent or private repository link

[Vladislav2951]

What Operating System(s) are you seeing this problem on?

Linux (x86-64)

Backend.AI version

24.03.10

Describe the bug

Docker build command for backend.ai/docker/agent/Dockerfile file returns an error and cannot been completed because the https://github.com/lablup/backend.ai-agent repository is non-existent or private.

Additional error:

 => ERROR [3/8] RUN apt-get update &&     apt-get install --no-install-recommends -y netcat libzmq3-dev          12.5s 
------                                                                                                                 
 > [3/8] RUN apt-get update &&     apt-get install --no-install-recommends -y netcat libzmq3-dev:                      
10.32 Get:1 http://deb.debian.org/debian bookworm InRelease [151 kB]                                                   
10.38 Get:2 http://deb.debian.org/debian bookworm-updates InRelease [55.4 kB]                                          
10.41 Get:3 http://deb.debian.org/debian-security bookworm-security InRelease [48.0 kB]                                
10.50 Get:4 http://deb.debian.org/debian bookworm/main amd64 Packages [8787 kB]
11.28 Get:5 http://deb.debian.org/debian bookworm-updates/main amd64 Packages [2468 B]
11.28 Get:6 http://deb.debian.org/debian-security bookworm-security/main amd64 Packages [188 kB]
11.88 Fetched 9232 kB in 12s (794 kB/s)
11.88 Reading package lists...
12.14 Reading package lists...
12.39 Building dependency tree...
12.45 Reading state information...
12.45 Package netcat is a virtual package provided by:
12.45   netcat-openbsd 1.219-1
12.45   netcat-traditional 1.10-47
12.45 
12.45 E: Package 'netcat' has no installation candidate
------
Dockerfile:6
--------------------
   5 |     RUN pip install -U -q pip setuptools
   6 | >>> RUN apt-get update && \
   7 | >>>     apt-get install --no-install-recommends -y netcat libzmq3-dev
   8 |     RUN mkdir /app
--------------------
ERROR: failed to solve: process "/bin/sh -c apt-get update &&     apt-get install --no-install-recommends -y netcat libzmq3-dev" did not complete successfully: exit code: 100

To Reproduce

cd docker/agent/
docker build -t agent .

Expected Behavior

Create of the docker image that contains Agent only.

Anything else?

There was a need to install only the agent inside the docker image on the system.

I also did not find any information in the documentation about what this file is actually used for. Shall you help with the information about the purpose of these backend.ai/docker/ files, especially this backend.ai/docker/agent/Dockerfile?