Cherry-pick 0.4.0 release notes to release/v0.4.0 (#1351)

Release - 0.4.0: Add Release Notes and Versioned Docs (#1349)

release 0.4.0: add release notes and versioned docs


(cherry picked from commit 843d555)

Signed-off-by: AliceProxy <[email protected]>

VERSION

@@ -1 +1 @@
-v0.4.0-rc.1
+v0.4

docs/latest/releases/README.md

@@ -25,6 +25,7 @@ communications with the Envoy Gateway community, and the mechanics of the releas
 |:-------:|:--------------------------------------------------------------:|
 | 2022 Q4 |    Daneyon Hansen ([danehans](https://github.com/danehans))    |
 | 2023 Q1 |    Xunzhuo Liu ([Xunzhuo](https://github.com/Xunzhuo))         |
+| 2023 Q2 |    Alice Wasko ([AliceProxy](https://github.com/AliceProxy))   |
 
 ## Release Schedule
 
@@ -35,6 +36,7 @@ In order to align with the Envoy Proxy [release schedule][], Envoy Gateway relea
 |:-------:|:-----------:|:-----------:|:----------:|:-----------:|
 |  0.2.0  | 2022/10/22  | 2022/10/20  |   -2 day   |  2023/4/20  |
 |  0.3.0  | 2023/01/22  | 2023/02/09  |   +17 day  |  2023/08/09 |
+|  0.3.0  | 2023/04/22  | 2023/04/24  |   +2 day   |  2023/10/24 |
 
 [v2.0.0 spec]: https://semver.org/spec/v2.0.0.html
 [release guide]: ../dev/releasing.md

docs/latest/releases/v0.4.md

@@ -0,0 +1,61 @@
+---
+title: Announcing Envoy Gateway v0.4
+linktitle: v0.4
+subtitle: Major Update
+description: Envoy Gateway v0.4 release announcement.
+publishdate: 2023-04-24
+release: v0.4.0
+skip_list: true
+aliases:
+- /releases/v0.4
+- /releases/v0.4.0
+---
+# Envoy Gateway Release v0.4
+
+We are pleased to announce the release of Envoy Gateway v0.4!
+
+This is the third functional release of Envoy Gateway. We would like to thank the entire Envoy Gateway community for
+helping publish the release.
+
+| [Release Notes][] | [Docs][docs] | [Compatibility Matrix][matrix] | [Download][] |
+|-------------------|--------------|--------------------------------|--------------|
+
+## What's New
+
+The release adds a ton of features and functionality. Here are some highlights:
+
+### Upgrade Gateway API Dependency
+
++ Upgraded to Gateway API v0.6.2
+
+### Add Helm Support
+
++ Installation of Envoy Gateway can now be done through helm
+
+### Add egctl CLI Tool
+
++ Added egctl Support for Dry Runs of Gateway API Config
++ Added egctl Support for Dumping Envoy Proxy xDS Resources
+
+### Add Support for extending Envoy Gateway
+
++ Added Initial Framework for Building an Extension on top of Envoy Gateway
+
+### Ratelimiting
+
++ Added Support for Ratelimiting Based On IP Subnet
+
+### API Updates
+
++ Added Support for Custom Envoy Proxy Bootstrap Config
++ Added Support for Configuring the Envoy Proxy Image and Service
++ Added Support for Configuring Annotations, Resources, and Securitycontext Settings on Ratelimit Infra and Envoy Proxy
++ Added Support for Using Multiple Certificates on a Single Fully Qualified Domain Name
++ Envoy Proxy Pod and Container SecurityContext is now Configurable
++ Added Support for Service Method Match in GRPCRoute
++ Added EDS Support
+
+[Release Notes]: https://github.com/envoyproxy/gateway/blob/main/release-notes/v0.4.0.yaml
+[matrix]: https://gateway.envoyproxy.io/v0.4.0/intro/compatibility.html
+[docs]: https://gateway.envoyproxy.io/v0.4.0/index.html
+[Download]: https://github.com/envoyproxy/gateway/releases/tag/v0.4.0

docs/v0.4/about_docs.rst

@@ -0,0 +1,9 @@
+About the Documentation
+=======================
+
+Learn how to contribute to Envoy Gateway documentation.
+
+.. toctree::
+  :maxdepth: 1
+
+  dev/DOCS