Add upgrade guide from 0.4.x to 0.5.0 (#490)

Documentation/docs-site/config.toml

@@ -1,4 +1,4 @@
-baseURL = "http://fission.io/docs/0.4.0"
+baseURL = "http://fission.io/docs/0.5.0"
 languageCode = "en-US"
 defaultContentLanguage = "en"
 

Documentation/docs-site/content/upgrade/_index.en.md

@@ -4,9 +4,11 @@ date: 2017-09-07T20:10:05-07:00
 weight: 30
 ---
 
-### From v0.1 to v0.2.x
+### From v0.4.x to v0.5.0
-
+* [Upgrade guide](upgrade-from-v0.4)
-* [Upgade guide](upgrade-from-v0.1)
 
 ### From v0.3 to v0.4.x
 * [Upgrade guide](upgrade-from-v0.3)
+
+### From v0.1 to v0.2.x
+* [Upgade guide](upgrade-from-v0.1)

Documentation/docs-site/content/upgrade/upgrade-from-v0.4.md

@@ -0,0 +1,44 @@
+---
+title: "Upgrading from v0.4.x to v0.5.0"
+date: 2018-2-08T04:40:29+08:00
+draft: false
+weight: 33
+---
+
+## How to Upgrade
+
+1. Get the 0.5.0 CLI
+2. Upgrade to Fission 0.5.0
+
+### Get the new CLI
+
+#### OS X
+
+``` bash
+$ curl -Lo fission https://github.com/fission/fission/releases/download/0.5.0/fission-cli-osx && chmod +x fission && sudo mv fission /usr/local/bin/
+```
+
+#### Linux
+
+``` bash
+$ curl -Lo fission https://github.com/fission/fission/releases/download/0.5.0/fission-cli-linux && chmod +x fission && sudo mv fission /usr/local/bin/
+```
+
+#### Windows
+
+For Windows, you can use the linux binary on WSL. Or you can download
+this windows executable: [fission.exe](https://github.com/fission/fission/releases/download/0.5.0/fission-cli-windows.exe)
+
+### Upgrade to Fission 0.5.0
+
+Upgrade fission with a command similar to this:
+
+
+
+``` bash
+# find the release want to upgrade
+$ helm list
+
+# upgrade to 0.5.0
+$ helm upgrade <release_name> https://github.com/fission/fission/releases/download/0.5.0/fission-all-0.5.0.tgz
+```