request: gettext-base, kubectl, doctl

[mautematico]

Is your feature request related to a problem? Please describe

I've learned about custom dockerfile: https://www.gitpod.io/docs/configure/workspaces/workspace-image#configure-a-custom-dockerfile
and already using it to extend https://hub.docker.com/r/gitpod/workspace-full to install

• kubectl from apt
• doctl from latest bin release
• gettext-base from apt
• kubectl autocomplete

however, each run takes several minutes to complete, while building (unchanged) custom dockerfile

Describe the behaviour you'd like

I think it would be useful for a portion of users to have such tools on the full image to avoid having to install them on every run or extending the image.

Describe alternatives you've considered

• init: does not preserve installed packages given those are installed outside of /workspace
• command: works just fine; it is not so fast and also not too slow, but could be faster.
• [edit] using a public registry for my custom image seems like an acceptable alternative solution

Additional context

a lot of opinions here but might be useful as a PR starter:

FROM gitpod/workspace-full:latest

RUN sudo mkdir -p /etc/apt/keyrings/
RUN sudo curl -fsSLo /etc/apt/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
RUN echo "deb [signed-by=/etc/apt/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
RUN sudo install-packages gettext-base kubectl
RUN kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl > /dev/null
RUN wget -nv https://github.com/digitalocean/doctl/releases/download/v1.86.0/doctl-1.86.0-linux-amd64.tar.gz && \
tar xf doctl-1.86.0-linux-amd64.tar.gz && \
sudo install -o root -g root -m 0755 doctl /usr/local/bin/doctl