diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..6814e3a
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "BaseEnvironment"]
+	path = BaseEnvironment
+	url = https://github.com/StudioBside/BaseEnvironment.git
diff --git a/BaseEnvironment b/BaseEnvironment
new file mode 160000
index 0000000..bd32377
--- /dev/null
+++ b/BaseEnvironment
@@ -0,0 +1 @@
+Subproject commit bd323773e9c46e940e2ee590826cb55f439683af
diff --git a/Document/nuget.readme.md b/Document/nuget.readme.md
index b9848a6..afd790e 100644
--- a/Document/nuget.readme.md
+++ b/Document/nuget.readme.md
@@ -1 +1,6 @@
-## Mobile Game Ranking (google play store, Korea) Crawler
\ No newline at end of file
+## 게임 매출 순위 알림
+
+간간히 찾아보는 게임 매출 순위 정보를 슬랙으로 받아보게 해주는 toy project 입니다. 데이터는 [https://app.sensortower.com/](https://app.sensortower.com/) 에서 가져옵니다. 
+데이터 크롤링은 [selenium](https://www.selenium.dev/)을 사용합니다.
+
+![](https://raw.githubusercontent.com/leafbird/GameRankReader/main/Document/Images/message_example.png)
diff --git a/GameRank.Core/GameRank.Core.csproj b/GameRank.Core/GameRank.Core.csproj
index 5d99a2f..12d3a7b 100644
--- a/GameRank.Core/GameRank.Core.csproj
+++ b/GameRank.Core/GameRank.Core.csproj
@@ -4,7 +4,7 @@
     <TargetFramework>net7.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
-    <CodeAnalysisRuleSet>../Leafbird.CodingStyle.ruleset</CodeAnalysisRuleSet>
+    <CodeAnalysisRuleSet>..\BaseEnvironment\CodingStyle.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
     
   <PropertyGroup>
@@ -13,13 +13,13 @@
     <PackageVersion>0.0.1.0</PackageVersion>
     <Title>GameRank.Core</Title>
     <Authors>leafbird</Authors>
-    <PackageLicenseExpression>MS-PL</PackageLicenseExpression>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageProjectUrl>https://github.com/leafbird/GameRankReader </PackageProjectUrl>
     <PackageIcon>icon.png</PackageIcon>
     <PackageReadmeFile>nuget.readme.md</PackageReadmeFile>
     <PackageRequireLicenseAcceptance>true</PackageRequireLicenseAcceptance>
     <PackageReleaseNotes>first release</PackageReleaseNotes>
-    <Description>It is an automation bot that crawls mobile game revenue rankings and sends them as Slack messages.</Description>
+    <Description>An automation bot that crawls mobile game revenue rankings and sends them as Slack messages.</Description>
     <Copyright>Copyright © 2023 leafbird Limited</Copyright>
     <PackageTags>mobile game rank</PackageTags>
   </PropertyGroup>
diff --git a/GameRank.Crawler/GameRank.Crawler.csproj b/GameRank.Crawler/GameRank.Crawler.csproj
index 1465c95..a7db3d4 100644
--- a/GameRank.Crawler/GameRank.Crawler.csproj
+++ b/GameRank.Crawler/GameRank.Crawler.csproj
@@ -7,7 +7,7 @@
     <Nullable>enable</Nullable>
     <PublishSingleFile>true</PublishSingleFile>
     <SelfContained>true</SelfContained>
-    <CodeAnalysisRuleSet>../Leafbird.CodingStyle.ruleset</CodeAnalysisRuleSet>
+    <CodeAnalysisRuleSet>..\BaseEnvironment\CodingStyle.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/Leafbird.CodingStyle.ruleset b/Leafbird.CodingStyle.ruleset
deleted file mode 100644
index c6dbde0..0000000
--- a/Leafbird.CodingStyle.ruleset
+++ /dev/null
@@ -1,91 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<RuleSet Name="my coding style." Description="private code analysis rules." ToolsVersion="17.0">
-  <Rules AnalyzerId="Microsoft.Analyzers.ManagedCodeAnalysis" RuleNamespace="Microsoft.Rules.Managed">
-    <Rule Id="CA1001" Action="Warning" />
-    <Rule Id="CA1009" Action="Warning" />
-    <Rule Id="CA1016" Action="Warning" />
-    <Rule Id="CA1033" Action="Warning" />
-    <Rule Id="CA1049" Action="Warning" />
-    <Rule Id="CA1060" Action="Warning" />
-    <Rule Id="CA1061" Action="Warning" />
-    <Rule Id="CA1063" Action="Warning" />
-    <Rule Id="CA1065" Action="Warning" />
-    <Rule Id="CA1301" Action="Warning" />
-    <Rule Id="CA1400" Action="Warning" />
-    <Rule Id="CA1401" Action="Warning" />
-    <Rule Id="CA1403" Action="Warning" />
-    <Rule Id="CA1404" Action="Warning" />
-    <Rule Id="CA1405" Action="Warning" />
-    <Rule Id="CA1410" Action="Warning" />
-    <Rule Id="CA1415" Action="Warning" />
-    <Rule Id="CA1821" Action="Warning" />
-    <Rule Id="CA1900" Action="Warning" />
-    <Rule Id="CA1901" Action="Warning" />
-    <Rule Id="CA2002" Action="Warning" />
-    <Rule Id="CA2100" Action="Warning" />
-    <Rule Id="CA2101" Action="Warning" />
-    <Rule Id="CA2108" Action="Warning" />
-    <Rule Id="CA2111" Action="Warning" />
-    <Rule Id="CA2112" Action="Warning" />
-    <Rule Id="CA2114" Action="Warning" />
-    <Rule Id="CA2116" Action="Warning" />
-    <Rule Id="CA2117" Action="Warning" />
-    <Rule Id="CA2122" Action="Warning" />
-    <Rule Id="CA2123" Action="Warning" />
-    <Rule Id="CA2124" Action="Warning" />
-    <Rule Id="CA2126" Action="Warning" />
-    <Rule Id="CA2131" Action="Warning" />
-    <Rule Id="CA2132" Action="Warning" />
-    <Rule Id="CA2133" Action="Warning" />
-    <Rule Id="CA2134" Action="Warning" />
-    <Rule Id="CA2137" Action="Warning" />
-    <Rule Id="CA2138" Action="Warning" />
-    <Rule Id="CA2140" Action="Warning" />
-    <Rule Id="CA2141" Action="Warning" />
-    <Rule Id="CA2146" Action="Warning" />
-    <Rule Id="CA2147" Action="Warning" />
-    <Rule Id="CA2149" Action="Warning" />
-    <Rule Id="CA2200" Action="Warning" />
-    <Rule Id="CA2202" Action="Warning" />
-    <Rule Id="CA2207" Action="Warning" />
-    <Rule Id="CA2212" Action="Warning" />
-    <Rule Id="CA2213" Action="Warning" />
-    <Rule Id="CA2214" Action="Warning" />
-    <Rule Id="CA2216" Action="Warning" />
-    <Rule Id="CA2220" Action="Warning" />
-    <Rule Id="CA2229" Action="Warning" />
-    <Rule Id="CA2231" Action="Warning" />
-    <Rule Id="CA2232" Action="Warning" />
-    <Rule Id="CA2235" Action="Warning" />
-    <Rule Id="CA2236" Action="Warning" />
-    <Rule Id="CA2237" Action="Warning" />
-    <Rule Id="CA2238" Action="Warning" />
-    <Rule Id="CA2240" Action="Warning" />
-    <Rule Id="CA2241" Action="Warning" />
-    <Rule Id="CA2242" Action="Warning" />
-  </Rules>
-  <Rules AnalyzerId="Microsoft.CodeAnalysis.CSharp.Features" RuleNamespace="Microsoft.CodeAnalysis.CSharp.Features">
-    <Rule Id="IDE0009" Action="Error" />
-  </Rules>
-  <Rules AnalyzerId="StyleCop.Analyzers" RuleNamespace="StyleCop.Analyzers">
-    <Rule Id="SA0001" Action="None" />
-    <Rule Id="SA1028" Action="None" />
-    <Rule Id="SA1121" Action="None" />
-    <Rule Id="SA1124" Action="None" />
-    <Rule Id="SA1127" Action="None" />
-    <Rule Id="SA1128" Action="None" />
-    <Rule Id="SA1129" Action="None" />
-    <Rule Id="SA1515" Action="None" />
-    <Rule Id="SA1516" Action="None" />
-    <Rule Id="SA1600" Action="None" />
-    <Rule Id="SA1601" Action="None" />
-    <Rule Id="SA1602" Action="None" />
-    <Rule Id="SA1611" Action="None" />
-    <Rule Id="SA1612" Action="None" />
-    <Rule Id="SA1615" Action="None" />
-    <Rule Id="SA1623" Action="None" />
-    <Rule Id="SA1633" Action="None" />
-    <Rule Id="SA1649" Action="None" />
-    <Rule Id="SA1652" Action="None" />
-  </Rules>
-</RuleSet>
\ No newline at end of file
diff --git a/readme.md b/readme.md
index e3714d6..d996e78 100644
--- a/readme.md
+++ b/readme.md
@@ -1,7 +1,7 @@
-## 게임 매출 순위 알림
-
 [![.NET](https://github.com/leafbird/GameRankReader/actions/workflows/dotnet.yml/badge.svg)](https://github.com/leafbird/GameRankReader/actions/workflows/dotnet.yml)
 
+## 게임 매출 순위 알림
+
 간간히 찾아보는 게임 매출 순위 정보를 슬랙으로 받아보게 해주는 toy project 입니다. 데이터는 [https://app.sensortower.com/](https://app.sensortower.com/) 에서 가져옵니다. 
 데이터 크롤링은 [selenium](https://www.selenium.dev/)을 사용합니다.