fix: add libxfixes3 to Docker runtime dependencies

[frizikk]

Without this library, Chromium-based browser tools fail to initialize in the container, typically resulting in an error related to a missing shared library: libXfixes.so.3. This change ensures all necessary X11 extensions are present for headless
browser operations.

Note

Adds the libxfixes3 package to the Dockerfile runtime dependencies. This single-line change resolves initialization failures for Chromium-based browser tools in containerized environments by providing the required X11 Fixes extension library.

_{Written by Tembo for commit 8f21ed4. This will update automatically on new commits.}

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: f3916be0-9f6b-49e3-a3f6-c9c869d8c3dc

📥 Commits

Reviewing files that changed from the base of the PR and between ed3aebe and 8f21ed4.

📒 Files selected for processing (1)

• Dockerfile

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Walkthrough

A single library dependency (libxfixes3) was added to the runtime dependencies in the Dockerfile's Debian-based runtime stage. No logic or control flow changes were made.

Changes

Cohort / File(s)	Summary
Dockerfile Runtime Dependencies Dockerfile	Added libxfixes3 to the apt-get install list in the runtime stage to satisfy runtime library requirements.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• fix: add missing libxkbcommon0 to Docker runtime deps #426: Adds another missing Debian runtime library (libxkbcommon0) to the same Dockerfile runtime-stage apt-get install list.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'fix: add libxfixes3 to Docker runtime dependencies' directly and accurately describes the main change in the changeset: adding a single library dependency to the Dockerfile.
Description check	✅ Passed	The description is clearly related to the changeset, explaining the motivation for adding libxfixes3 (Chromium browser initialization failures) and the specific impact (X11 Fixes extension support for headless browsers).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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