Closes #1795 - Support building and developing in a devcontainer

[Spitfire1900]

What Changed

I added .devcontainer/devcontainer.json to run the project within an instance of VSCode using Dev Container features

Why

I don't want to mutate my local environment to do development work on T3Code and this should also add support to doing Development work on GitHub Codespaces.

You are able to connect directly to the web instance of T3Code using bun run dev:web in the container and connecting to http://127.0.0.1:5733/ on the host machine.

UI Changes

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes
• I've successfully ran T3Code web and built the appimage locally.

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Note

Low Risk
Low risk: adds optional local dev tooling (.devcontainer) and a new ignored build artifact path, without changing runtime or application logic.

Overview
Adds a .devcontainer/devcontainer.json to support developing/building the repo in a VS Code Dev Container/Codespaces using Debian Bookworm with Bun, Node.js 24, and Python 3.12, plus a post-create bun install step and a recommended VS Code extension.

Updates .gitignore to exclude squashfs-root/ (SquashFS extraction artifacts) from version control.

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Note

Add devcontainer configuration for building and developing the project

Adds devcontainer.json with a Debian bookworm base image, Bun, Node.js v24 (with node-gyp dependencies), and Python 3.12. The post-create command runs bun install with the copyfile backend and a frozen lockfile, and the oxc VS Code extension is installed automatically. Also adds squashfs-root/ to .gitignore.

^{Macroscope summarized c387fa4.}

[coderabbitai]

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[Spitfire1900]

symlink support is not-supported within devcontainers

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[macroscopeapp]

Approvability

Verdict: Approved

Adds devcontainer configuration for development environments with no runtime impact. Changes are limited to a new devcontainer.json and a gitignore entry - purely developer tooling that doesn't affect production behavior.

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