doc: update document for v2.2.4

docs/_posts/2021-04-01-release-v2.2.4.md

@@ -0,0 +1,77 @@
+---
+title: "v2.2.4 - Bug Fixed 3"
+date: 2021-03-29 23:08:00 +0900
+categories:
+  - Release
+tags:
+  - News
+  - Release
+head_inline: "<style> ul { padding-bottom: 1em; } .blue { color: blue; }</style>"
+---
+
+#### Bug Fixes
+- [freeDiameter] A crash has been fixed when using a version prior to v2.2.3 ([#898](https://github.com/open5gs/open5gs/issues/898)) -- [Nour963](https://github.com/Nour963), [kbarlee](https://github.com/kbarlee)
+- [AMF] Fixed a crash when a lot of number simultaneous connections occur. ([#886](https://github.com/open5gs/open5gs/issues/886)) -- [dongzx666](https://github.com/dongzx666)
+- [MME/AMF] Fixed a bug when S-TMSI does not exist in InitialUEMessage ([#890](https://github.com/open5gs/open5gs/issues/890)) -- [chliny2016](https://github.com/chliny2016) 
+
+#### Enhancement
+- [MME/AMF] Added SACK_DELAY_TIME in the AMF/MME configuration files ([#895](https://github.com/open5gs/open5gs/issues/895)) -- [RafalArciszewski](https://github.com/RafalArciszewski) 
+- [DB] Updated Python Lib docs and script to migrate DB data to new format ([#889](https://github.com/open5gs/open5gs/pull/889)) -- [nickvsnetworking](https://github.com/nickvsnetworking) 
+
+#### IMPORTANT Using v2.2.x
+
+- **DB Schema Changes:** If you are using an existing subscription DB, you should delete the existing DB. Then you can add a new subscription DB.
+{: .blue}
+```
+$ mongo
+> use open5gs
+switched to db open5gs
+> db.subscribers.drop()
+true
+```
+
+- **The New WebUI:** You have to log out using the old WebUI backend/frontend. Then, you can log back in again using the new WebUI backend/frontend.
+{: .blue}
+```
+$ git checkout v2.1.7
+$ cd webui
+$ rm -Rf ./node_modules
+$ npm ci --no-optional
+$ npm run dev
+
+## You should log out
+
+$ git checkout main
+$ cd webui
+$ rm -Rf ./node_modules
+$ npm ci --no-optional
+$ npm run dev
+
+## You can log back in
+```
+
+- freeDiameter version has changed from 1.3.2 to 1.5.0. If you want to compile the source code, you need to update meson subprojects as shown below.
+{: .blue}
+
+```
+$ cd open5gs
+$ git pull
+$ meson subprojects update
+$ cd build
+$ ninja
+```
+
+Or just use a clean github repository.
+
+```
+$ rm -Rf open5gs
+$ git clone https://github.com/open5gs/open5gs
+$ cd open5gs
+$ meson build --prefix=`pwd`/install
+$ cd build
+$ ninja
+```
+
+
+Download -- [v2.2.4.tar.gz](https://github.com/open5gs/open5gs/archive/v2.2.4.tar.gz)
+{: .notice--info}