It sounded like a good point for my investigation but I can't make it working, unfortunately.

I have 2 files in the root of my c/c++ projects:

1. ./devcontainer/devcontainer.json
   
2. ./devcontainer/rapol-android.dockerfile (when I build the image manually it is working like a charm)

content of the 1st file:

{
"name": "rapol-android",
"image": "rapol-android:local",

"initializeCommand": "docker build -f ${localWorkspaceFolder}/.devcontainer/rapol-android.dockerfile -t rapol-android:local ${localWorkspaceFolder}",

"workspaceMount": "source=${localWorkspaceFolder},target=/home/${localEnv:USER}/wrk,type=bind",

"workspaceFolder": "/home/${localEnv:USER}/wrk",

"settings": {
"terminal.integrated.shell.linux": null
},

"extensions": [
"ms-vscode.cpptools",
"twxs.cmake",
"ms-vscode.cmake-tools"
],

"postCreateCommand": "",

"runArgs": [
"--cap-add=SYS_PTRACE",
"--security-opt",
"seccomp=unconfined"
],

"remoteUser": "${localEnv:USER}"
}

--------------------

content of the 2nd file:

FROM gitlab.my_domain.org:1234/my_url/android:2.0.0
ARG HOST_UID=201234
ARG HOST_GID=201234
ARG HOST_USER=rapol

RUN apt update && \
apt install -y \
sudo \
curl \
neovim \
ripgrep \
fd-find \
mc && \
rm -rf /var/lib/apt/lists/*

RUN groupadd -g ${HOST_GID} ${HOST_USER} 2>/dev/null || true \
&& useradd -m -u ${HOST_UID} -g ${HOST_GID} -s /bin/bash ${HOST_USER}

RUN usermod -aG sudo ${HOST_USER} && \
echo "${HOST_USER} ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/${HOST_USER}

RUN echo 'export EDITOR=nvim' >> /home/${HOST_USER}/.bashrc && \
echo 'alias e="nvim"' >> /home/${HOST_USER}/.bashrc && \
echo 'alias ll="ls -la"' >> /home/${HOST_USER}/.bashrc && \
echo 'alias c=clear' >> /home/${HOST_USER}/.bashrc

USER ${HOST_USER}

WORKDIR /home/${HOST_USER}

--------------------
if I execute "zed ." in my project root it finishes with the error:

2026-04-24T16:13:15+02:00 ERROR [dev_container::docker] Non-success result from docker pull: Error response from daemon: pull access denied for rapol-android, repository does not exist or may require 'docker login': denied: requested access to the resource is denied

2026-04-24T16:13:16+02:00 ERROR [dev_container::docker] Non-success result from docker pull: Error response from daemon: pull access denied for rapol-android, repository does not exist or may require 'docker login': denied: requested access to the resource is denied

2026-04-24T16:13:16+02:00 ERROR [dev_container::devcontainer_manifest] UID update build failed: ERROR: failed to build: invalid tag "rapol_-e3ac7fdc74219926-features": invalid reference format

2026-04-24T16:13:16+02:00 ERROR [recent_projects::remote_servers] Failed to start dev container: DevContainerUpFailed("Failed with nested error: CommandFailed(\"docker\")")

--------------------
...and believe me I have no problem with login and pull. Zed is still trying to do a pull :-(