docs: aligned documentation with org (#109)

Signed-off-by: Frédéric BIDON <fredbi@yahoo.com>

Author: fredbi

.github/CONTRIBUTING.md

@@ -18,12 +18,9 @@ Shared errors and error interface used throughout the various libraries found in
 
 * **2025-12-19** : new community chat on discord
   * a new discord community channel is available to be notified of changes and support users
-  * our venerable Slack channel remains open, and will be eventually discontinued on **2026-03-31**
 
 You may join the discord community by clicking the invite link on the discord badge (also above). [![Discord Channel][discord-badge]][discord-url]
 
-Or join our Slack channel: [![Slack Channel][slack-logo]![slack-badge]][slack-url]
-
 ## Status
 
 API is stable.
@@ -69,9 +66,9 @@ This library ships under the [SPDX-License-Identifier: Apache-2.0](./LICENSE).
 ## Other documentation
 
 * [All-time contributors](./CONTRIBUTORS.md)
-* [Contributing guidelines](.github/CONTRIBUTING.md)
-* [Maintainers documentation](docs/MAINTAINERS.md)
-* [Code style](docs/STYLE.md)
+* [Contributing guidelines][contributing-doc-site]
+* [Maintainers documentation][maintainers-doc-site]
+* [Code style][style-doc-site]
 
 ## Cutting a new release
 
@@ -102,9 +99,6 @@ Maintainers can cut a new release by either:
 <!-- Badges: documentation & support -->
 [godoc-badge]: https://pkg.go.dev/badge/github.com/go-openapi/errors
 [godoc-url]: http://pkg.go.dev/github.com/go-openapi/errors
-[slack-logo]: https://a.slack-edge.com/e6a93c1/img/icons/favicon-32.png
-[slack-badge]: https://img.shields.io/badge/slack-blue?link=https%3A%2F%2Fgoswagger.slack.com%2Farchives%2FC04R30YM
-[slack-url]: https://goswagger.slack.com/archives/C04R30YMU
 [discord-badge]: https://img.shields.io/discord/1446918742398341256?logo=discord&label=discord&color=blue
 [discord-url]: https://discord.gg/FfnFYaC3k5
 
@@ -116,3 +110,7 @@ Maintainers can cut a new release by either:
 [goversion-url]: https://github.com/go-openapi/errors/blob/master/go.mod
 [top-badge]: https://img.shields.io/github/languages/top/go-openapi/errors
 [commits-badge]: https://img.shields.io/github/commits-since/go-openapi/errors/latest
+<!-- Organization docs -->
+[contributing-doc-site]: https://go-openapi.github.io/doc-site/contributing/contributing/index.html
+[maintainers-doc-site]: https://go-openapi.github.io/doc-site/maintainers/index.html
+[style-doc-site]: https://go-openapi.github.io/doc-site/contributing/style/index.html