Add How to connect to Minecraft server

Author: stoneskin

documents/1_SetUpMineCraftServer/1.1_HowToSetUpMineCraftServer.md

@@ -62,4 +62,3 @@ For detail please visit <https://minecraft.gamepedia.com/Server.properties>.
 
 - [Continue to RespberryJuice plugin](./1.2_HowToEnablePythonForMineCraftServer.md)
 
-- [Back to main](../../README.md)

documents/1_SetUpMineCraftServer/1.2_HowToEnablePythonForMineCraftServer.md

@@ -26,4 +26,4 @@ If you want to install it yourself, you could download from the from *RaspberryJ
 
 ---
 
-[back to main - how to install mcpi](../../README.md#install-mcip-python-module)
+- [Continue to How connect to Minecraft server](./1.3_HowToConnectToYouMinecraftServer.md)

documents/1_SetUpMineCraftServer/1.3_HowToConnectToYouMinecraftServer.md

@@ -0,0 +1,34 @@
+[back to main](../../README.md)
+
+# How to SetUp a Minecraft Server (Java Edition)
+
+We use Minecraft 1.15.2 for both server and client.
+
+Your PC have a speical address and it never changed **"localhost"** or **"127.0.0.1"**.
+
+Please follow steps below to join your Minecraft server
+
+## Step 1
+
+**Open Minecraft make user use the saver version of the Minecraft server, and click "Multiplayer"**
+![step1](./JoinMineCraftServer-1.png)
+
+## Step 2
+
+**In the Multiplayer page, select Add Server**
+![step1](./JoinMineCraftServer-2.png)
+
+## Step 3
+
+**Give a server name,  and put `localhost` in the Server Address box"**
+![step1](./JoinMineCraftServer-3.png)
+
+## Step 4
+
+**Back to Multiplayer Screen, you will see your new added server in the list., Click that, and click "Join Server"**
+![step1](./JoinMineCraftServer-4.png)
+
+
+---
+
+[back to main - continue on Python mcpi installation](../../README.md#install-mcip-python-module)