Add a deprecation notices section

README.md

@@ -88,8 +88,6 @@ You can access the simple HTML frontend of Traefik.
 
 You can find the complete documentation of Traefik v2 at [https://doc.traefik.io/traefik/](https://doc.traefik.io/traefik/).
 
-If you are using Traefik v1, you can find the complete documentation at [https://doc.traefik.io/traefik/v1.7/](https://doc.traefik.io/traefik/v1.7/).
-
 A collection of contributions around Traefik can be found at [https://awesome.traefik.io](https://awesome.traefik.io).
 
 ## Support

docs/content/deprecation/releases.md

@@ -0,0 +1,37 @@
+# Releases
+
+## Versions
+
+Below is a non-exhaustive list of versions and their maintenance status:
+
+| Version | Release Date | Active Support     | Security Support | 
+|---------|--------------|--------------------|------------------|
+| 2.6     | Jan 24, 2022 |      Yes           |       Yes        |
+| 2.5     | Aug 17, 2021 | Ended Jan 24, 2022 |       No         |
+| 2.4     | Jan 19, 2021 | Ended Aug 17, 2021 |       No         |
+| 2.3     | Sep 23, 2020 | Ended Jan 19, 2021 |       No         |
+| 2.2     | Mar 25, 2020 | Ended Sep 23, 2020 |       No         |
+| 2.1     | Dec 11, 2019 | Ended Mar 25, 2020 |       No         |
+| 2.0     | Sep 16, 2019 | Ended Dec 11, 2019 |       No         |
+| 1.7     | Sep 24, 2018 | Ended Dec 31, 2021 |  Contact Support |
+
+??? example "Active Support / Security Support"
+
+    **Active support**: receives any bug fixes.
+    **Security support**: receives only critical bug and security fixes.
+
+This page is maintained and updated periodically to reflect our roadmap and any decisions affecting the end of support for Traefik Proxy.
+
+Please refer to our migration guides for specific instructions on upgrading between versions, an example is the [v1 to v2 migration guide](../migration/v1-to-v2.md).
+
+!!! important "All target dates for end of support or feature removal announcements may be subject to change."
+
+## Versioning Scheme
+
+The Traefik Proxy project follows the [semantic versioning](https://semver.org/) scheme and maintains a separate branch for each minor version. The main branch always represents the next upcoming minor or major version.
+
+And these are our guiding rules for version support:
+
+- **Only the latest `minor`** will be on active support at any given time
+- **The last `minor` after releasing a new `major`** will be supported for 1 year following the `major` release
+- **Previous rules are subject to change** and in such cases an announcement will be made publicly, [here](https://traefik.io/blog/traefik-2-1-in-the-wild/) is an example extending v1.x branch support.

docs/mkdocs.yml

@@ -196,3 +196,5 @@ nav:
         - 'KV': 'reference/dynamic-configuration/kv.md'
         - 'Marathon': 'reference/dynamic-configuration/marathon.md'
         - 'Rancher': 'reference/dynamic-configuration/rancher.md'
+  - 'Deprecation Notices':
+      - 'Releases': 'deprecation/releases.md'