Add reverse proxy docker documentation

[J-Drolet]

Add information regarding the BEHIND_PROXY environment variable to the docker documentation to address #202.

This is my first OSS contribution so hopefully this is helpful. Open to feedback 😄

Summary by CodeRabbit

• Documentation
  • Added clearer guidance for setting up the app behind a reverse proxy.
  • Documented key environment variables and expected behavior when using an HTTPS app URL.
  • Included an updated example showing port mapping, mounting a custom configuration, and proxy-related settings.

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[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: 66da4f16-dce7-4b8a-b2b3-a1a482a04c66

📥 Commits

Reviewing files that changed from the base of the PR and between e4c937d and 9cc81bb.

📒 Files selected for processing (1)

• docs/panel/advanced/docker.mdx

📜 Recent review details

🧰 Additional context used

🧠 Learnings (1)

📚 Learning: 2026-02-02T01:29:01.167Z

Learnt from: parkervcp
Repo: pelican-dev/docs PR: 186
File: docs/guides/disk-quotas/ext4-xfs.mdx:176-192
Timestamp: 2026-02-02T01:29:01.167Z
Learning: In the Pelican docs repo (pelican-dev/docs), trailing slashes on device paths (e.g., /dev/sdb/) in the disk quotas guidance should not be flagged. Accept both forms and ensure this exception is only applied to device path examples in documentation; maintain standard validation for other content.

Applied to files:

• docs/panel/advanced/docker.mdx

🪛 LanguageTool

docs/panel/advanced/docker.mdx

[grammar] ~196-~196: Ensure spelling is correct
Context: ...e a custom Caddyfile as described above.
An example compose.yml for hosting the...

(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)

🔇 Additional comments (3)

docs/panel/advanced/docker.mdx (3)

190-190: 📐 Maintainability & Code Quality | ⚡ Quick win

Grammar: "running the panel on with an APP_URL".

Awkward phrasing; "on with" reads as a typo.

✏️ Proposed fix

-When running the panel on with an `APP_URL` starting with `https://` behind a reverse proxy that handles TLS (SSL), the following configuration should be set:
+When running the panel with an `APP_URL` starting with `https://` behind a reverse proxy that handles TLS (SSL), the following configuration should be set:

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147-147: LGTM!

Also applies to: 196-196, 200-231

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192-192: 🎯 Functional Correctness

Make the reverse-proxy env var consistent. The instructions use BEHIND_PROXY, but the example sets REVERSE_PROXY; one of these names is wrong and the docs need to match.

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📝 Walkthrough

Walkthrough

This PR updates documentation in docs/panel/advanced/docker.mdx by inserting a heading before the reverse-proxy example and adding a new "Reverse Proxy Configuration" subsection describing BEHIND_PROXY, TRUSTED_PROXIES environment variables and an example compose.yml.

Changes

Reverse Proxy Documentation

Layer / File(s)	Summary
Reverse proxy documentation additions docs/panel/advanced/docker.mdx	Adds a "Installing behind a reverse proxy" heading and a new "Reverse Proxy Configuration" subsection covering BEHIND_PROXY, TRUSTED_PROXIES, custom Caddyfile usage, and an example compose.yml with port mapping.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Poem

A rabbit hops through docs anew,
Explaining proxies, tried and true,
BEHIND_PROXY set, TRUSTED_PROXIES too,
A compose.yml example, crisp and true,
Hop along, reader — the config's in view! 🐇📄

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: adding Docker documentation for reverse proxy setup.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[JoanFo3123]

Just a comment. It would be better if you say like if the end user needs to be on https make url https otherwise http. Because it’s that easy for example.