fix(nginx): disable port_in_redirect to fix internal port leakage in redirects

[Copilot]

• Explore codebase and understand the issue
• Add port_in_redirect off; to both HTTP and HTTPS server blocks in default.conf.template
• Add breaking change note in README.md for users relying on the old behavior
• Run code review - no issues found

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Alpine image does not respect x-forwarded-port headers</issue_title>
<issue_description>This issue (issue #40) still exists, and apparently setting NGINX_X_FORWARDED_PORT does not work. Any additional backends listed at /address/* will result in a redirect to the internal ports of 8080 or 8443 regardless of the docker port proxying configuration if we visit /address for example (so the nginx will want to redirect this to /address/ but somehow the modsec-crs image is putting the internal ports in here, inappropriately)</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Alpine image does not respect x-forwarded-port headers #407

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[fzipi]

@copilot Add a comment in the README.md about this change, it might be breaking for those users that rely on the old behavior.

[Copilot]

@copilot Add a comment in the README.md about this change, it might be breaking for those users that rely on the old behavior.

Added a "Nginx port_in_redirect breaking change" section to README.md (commit 4283edb) that explains the behavior change and notes that users relying on the port being included in nginx-generated redirects will need to mount a custom default.conf.template to re-enable it.

[fzipi]

@theseion Added a note in the README to show it is breaking.