SandboxSDK DIND docs

[mikenomitch]

Summary

Adds Docker-in-Docker docs for SandboxSDK and a changelog

Documentation checklist

• Is there a changelog entry (guidelines)? If you don't add one for something awesome and new (however small) — how will our customers find out? Changelogs are automatically posted to RSS feeds, the Discord, and X.

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/changelog/	@cloudflare/pm-changelogs, @cloudflare/pcx-technical-writing
/src/content/docs/containers/	@mikenomitch, @th0m, @cloudflare/pcx-technical-writing, @cloudflare/cloudchamber
/src/content/docs/sandbox/	@whoiskatrin, @ghostwriternr, @cloudflare/pcx-technical-writing, @cloudflare/ai-agents
/src/content/partials/containers/	@mikenomitch, @th0m, @cloudflare/pcx-technical-writing, @cloudflare/cloudchamber

[github-actions]

Preview URL: https://a55e32fe.preview.developers.cloudflare.com
Preview Branch URL: https://nomitch-sandbox-did.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/sandbox/guides/docker-in-docker/	https://nomitch-sandbox-did.preview.developers.cloudflare.com/sandbox/guides/docker-in-docker/
https://developers.cloudflare.com/changelog/2026-02-16-docker-in-docker/	https://nomitch-sandbox-did.preview.developers.cloudflare.com/changelog/2026-02-16-docker-in-docker/
https://developers.cloudflare.com/containers/faq/	https://nomitch-sandbox-did.preview.developers.cloudflare.com/containers/faq/

[elithrar]

/bonk do a quick review pass for style and clarity

[ask-bonk]

Summary of changes made

File	Fix
changelog/.../2026-02-16-docker-in-docker.mdx:13	"Developing" → "Develop" (parallel structure with other bullets)
sandbox/guides/docker-in-docker.mdx:18	"docker" → "Docker" (capitalization consistency)
sandbox/guides/docker-in-docker.mdx:37-38	# # → # (removed duplicate comment marker)
partials/containers/dind-network-host-caveat.mdx:4	"egress or ingress from" → "send or receive traffic from" (clearer phrasing)

Not fixed (author judgment call)

• Changelog line 9: "since" vs "because" in the FAQ — minor and reads fine either way.
• Sandbox guide line 94: "Built images and containers are lost when the sandbox sleeps. You must persist them manually." — grammatically correct, but the author may want to rephrase to clarify where to persist (e.g., a registry, R2, etc.).

github run