Update security files and other governance files for best practices (j…

…aegertracing#5365)

Only changes in md for this one

Adding MAINTAINERS.md, and fixing a 404 in GOVERNANCE.md
Fixing CODE_OF_CONDUCT per template :
https://github.com/cncf/project-template/blob/main/CODE_OF_CONDUCT.md

Working on : jaegertracing#5363

---------

Signed-off-by: Jonah Kowall <[email protected]>
Co-authored-by: Yuri Shkuro <[email protected]>

CODE_OF_CONDUCT.md

@@ -1,3 +1,5 @@
 ## Community Code of Conduct
 
 Jaeger follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/master/code-of-conduct.md).
+
+Please contact the [Jaeger Maintainers](mailto:[email protected]) or the [CNCF Code of Conduct Committee](mailto:[email protected]) in order to report violations of the Code of Conduct.

GOVERNANCE.md

@@ -5,7 +5,7 @@ This document defines governance policies for the Jaeger project.
 ## Maintainers
 
 Jaeger Maintainers have write access to the Jaeger GitHub repository https://github.com/jaegertracing/jaeger.
-They can merge their own patches or patches from others. The current maintainers can be found in [CODEOWNERS](./CODEOWNERS).
+They can merge their own patches or patches from others. The current maintainers can be found in [MAINTAINERS](./MAINTAINERS.md).
 
 This privilege is granted with some expectation of responsibility: maintainers are people who care about the Jaeger project and want to help it grow and improve. A maintainer is not just someone who can make changes, but someone who has demonstrated his or her ability to collaborate with the team, get the most knowledgeable people to review code, contribute high-quality code, and follow through to fix issues (in code or tests).
 

MAINTAINERS.md

@@ -0,0 +1,13 @@
+The current Maintainers Group for the Jaeger Project consists of:
+
+| Name | Employer | Responsibilities |
+| ---- | -------- | ---------------- |
+| [@albertteoh](https://github.com/albertteoh) | PackSmith | All | 
+| [@jkowall](https://github.com/jkowall) | Aiven | ALL |
+| [@joe-elliott](https://github.com/joe-elliott) | Grafana Labs | ALL |
+| [@pavolloffay](https://github.com/pavolloffay) | RedHat | ALL |
+| [@yurishkuro](https://github.com/yurishkuro) | Meta | ALL |
+
+This list must be kept in sync with the [CNCF Project Maintainers list](https://github.com/cncf/foundation/blob/master/project-maintainers.csv).
+
+See [the project Governance](./GOVERNANCE.md) for how maintainers are selected and replaced.