- Don't use the builddeps image since it no longer tracks Debian
  testing. Use the same image in all stages of the build (save some
space).
- Install gnupg and curl in the stage that fetches the repos keys.
- Merge the APT installs in the final build stage. There's no need to
  install anything before running apt-get update (once the files are in
place).
- A little nicer handling of GPG keyrings (stole from the Datadog agent
  installation instructions).

I only added to mimic the kbfs mount in MacOS because smile-cli
depended on it but I've since removed Keybase from that utility
completely so it's no longer needed.

When I added the `|| true` to different Keybase utilities builds, it
applied to all of the previous commands which is not what I wanted. Wrap
them in curly brackets to get the behavior I wanted.

Package was removed from Debian and its suggested replacement is tnftp.

I have a plan to run a remote atd and add some aliases for remote
wrappers to at, atq and atrm. This image will be the image for atd
(along with the regular workbench) so running commands remotely will
have all of the tools ready.

- Replace go get with go install since that's the new blessed way of
  doing things (IIUC go get is going to be deprecated eventually). Don't
change for reg since that fails to build with go install.
- Ignore failure to build keybase and kbfs. It's some Golang dependency
  issue and right now it seems like we're moving away from Keybase
altogether in work so I'm not going to invest time trying to fix this.

Replace it from buildpack-deps to Debian. I don't know why, but there's
no image for Debian testing (currently Bookworm). With
buildpack-deps:testing you get Debian Bullseye (currently stable). I'm
guessing that Docker no longer builds the Debian testing variant for
that image (I missed that memo) and I'm getting the last build for that
image.

With https://github.com/cloudposse/packages/issues/1622 fixed for over 6
weeks now, I think it's safe to remove the workaround.

Add the AWS RDS instances certificate authority so that secure access is
verified with all of the tools.

Maybe it will fix the build issues.

They do the right for managing the different versions by using Debian's
alternative mechanism, but the directory permissions are wrong. I need
to file a bug.

- Replace a bunch of tools installed via Homebrew with Debian packages
  from Cloudposse's repository (I find it cleaner, faster and overall
better).
- Add tfenv, remove various Terraform versions.
- Install Helm2 package instead of downloading the binaries.
- Remove the helm2 symlink from Homebrew (should have been removed
  before).

For transmission-remote.

New work on managing my Git infrastructure.

Easier invocations.

Doesn't exist.

Needed from some other parts of Smile's infrastructure.

It complains on the code block. If only I could disable scanning of
specific lines.

Needed for Smile's infrastructure for now.

The new version requires a newer version of the connector than Debian
Bullseye has.

The version built from source has an issue and I really don't have the
inclination to find the cause. The binary from the GitHub release works
so hopefully the Homebrew version will also work.