Issue with DL3008 and its documentation

[eandersons]

• This is a bug report
• This is a feature request
• I searched existing issues before opening this one

Expected behavior

1. Best Dockerfile practices link in DL3008 page points to https://docs.docker.com/develop/develop-images/instructions/#apt-get.

2. Either version pinning or cache busting with apt-get update is taken into account to mitigate outdated package retrieval from build cache, therefore DL3008 is not reported.

   From apt-get best Dockerfile practices instructions:

   Using RUN apt-get update && apt-get install -y ensures your Dockerfile installs the latest package versions with no further coding or manual intervention. This technique is known as cache busting. You can also achieve cache busting by specifying a package version. This is known as version pinning.

   Taking this into account the current rationale and behaviour of DL3008 seems a bit outdated (examples in the aforementioned link confirms that).

   I am aware that version pinning still should be preferred, but in my opinion that should not be enforced or should be added as a separate rule that could be disabled when it would not be desirable.

Actual behavior

1. Best Dockerfile practices link in DL3008 page points to https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#apt-get, where nothing is mentioned about apt-get.
2. Cache busting with apt-get update and apt-get install in the same RUN instruction currently is not taken into account thus reporting DL3008.

Steps to reproduce the behavior

Output of hadolint --version:

Haskell Dockerfile Linter 2.12.0

Dockerfile (if relevant)

FROM gitpod/openvscode-server:1.85.1
RUN apt-get update && \
  apt-get --assume-yes install --no-install-recommends
    less \
    micro

Additional environment details (OS, stack version, etc.)

Ubuntu 22.04.3 LTS in a Docker container.