Put redirection logic in its own configuration file

[lemeurherve]

What feature do you want to see added?

From #11 (comment):

As an improvement [...] to avoid maintaining 2 copies of the rewrites, I would suggest to:

• Move the rewrites out of https://github.com/jenkins-infra/docker-issue-redirect/blob/main/docker/default.conf into a rewrite.conf file embeded in the container image so it would be the same in production.
  • Note: should be stored somewhere else than /etc/nginx/conf.d otherwise it would be overridden by the helm chart configuration mount. I suggest /etc/nginx/includes like the jira-to-github config.
• Then the container image default.conf would only have to include the file, like

  docker-issue-redirect/docker/default.conf

  Line 13 in 7d22e75

  include includes/jira-to-github-redirects.conf;

  • And of course the same in the default.conf in production: https://github.com/jenkins-infra/kubernetes-management/blob/6eaa98f0fedbe280e25b6afbdb26788aa374df37/config/publick8s_issue-redirect-jenkins-io.yaml#L59

Upstream changes

No response