diff --git a/.idea/misc.xml b/.idea/misc.xml
deleted file mode 100644
index e3e5d04..0000000
--- a/.idea/misc.xml
+++ /dev/null
@@ -1,23 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="JavaScriptSettings">
-    <option name="languageLevel" value="ES6" />
-  </component>
-  <component name="ProjectInspectionProfilesVisibleTreeState">
-    <entry key="Project Default">
-      <profile-state>
-        <expanded-state>
-          <State />
-          <State>
-            <id>Go</id>
-          </State>
-        </expanded-state>
-        <selected-state>
-          <State>
-            <id>Code style issuesGo</id>
-          </State>
-        </selected-state>
-      </profile-state>
-    </entry>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
deleted file mode 100644
index b1d4c06..0000000
--- a/.idea/modules.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/setup-ipsec-vpn.iml" filepath="$PROJECT_DIR$/.idea/setup-ipsec-vpn.iml" />
-    </modules>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/setup-ipsec-vpn.iml b/.idea/setup-ipsec-vpn.iml
deleted file mode 100644
index c956989..0000000
--- a/.idea/setup-ipsec-vpn.iml
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="WEB_MODULE" version="4">
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$" />
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
deleted file mode 100644
index 94a25f7..0000000
--- a/.idea/vcs.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
deleted file mode 100644
index a9fbb54..0000000
--- a/.idea/workspace.xml
+++ /dev/null
@@ -1,207 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ChangeListManager">
-    <list default="true" id="8a75e99c-4741-4971-bf11-54fd38b65e76" name="Default Changelist" comment="">
-      <change beforePath="$PROJECT_DIR$/docs/clients-zh.md" beforeDir="false" afterPath="$PROJECT_DIR$/docs/clients-zh.md" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/docs/clients.md" beforeDir="false" afterPath="$PROJECT_DIR$/docs/clients.md" afterDir="false" />
-    </list>
-    <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
-    <option name="SHOW_DIALOG" value="false" />
-    <option name="HIGHLIGHT_CONFLICTS" value="true" />
-    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
-    <option name="LAST_RESOLUTION" value="IGNORE" />
-  </component>
-  <component name="FileEditorManager">
-    <leaf>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/docs/clients.md">
-          <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
-            <state split_layout="SPLIT">
-              <first_editor relative-caret-position="430">
-                <caret line="419" column="6" selection-start-line="419" selection-start-column="6" selection-end-line="419" selection-end-column="6" />
-              </first_editor>
-              <second_editor />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/docs/clients-zh.md">
-          <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
-            <state split_layout="SPLIT">
-              <first_editor relative-caret-position="289">
-                <caret line="185" column="45" selection-start-line="185" selection-start-column="45" selection-end-line="185" selection-end-column="45" />
-              </first_editor>
-              <second_editor />
-            </state>
-          </provider>
-        </entry>
-      </file>
-    </leaf>
-  </component>
-  <component name="FindInProjectRecents">
-    <findStrings>
-      <find>aes128-sha1-modp2048</find>
-    </findStrings>
-    <replaceStrings>
-      <replace />
-    </replaceStrings>
-    <dirStrings>
-      <dir>$PROJECT_DIR$</dir>
-    </dirStrings>
-  </component>
-  <component name="GOROOT" path="/usr/local/go" />
-  <component name="Git.Settings">
-    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
-  </component>
-  <component name="IdeDocumentHistory">
-    <option name="CHANGED_PATHS">
-      <list>
-        <option value="$PROJECT_DIR$/docs/clients.md" />
-        <option value="$PROJECT_DIR$/docs/clients-zh.md" />
-      </list>
-    </option>
-  </component>
-  <component name="JsFlowSettings">
-    <service-enabled>true</service-enabled>
-    <exe-path />
-    <other-services-enabled>true</other-services-enabled>
-    <auto-save>true</auto-save>
-  </component>
-  <component name="ProjectConfigurationFiles">
-    <option name="files">
-      <list>
-        <option value="$PROJECT_DIR$/.idea/setup-ipsec-vpn.iml" />
-        <option value="$PROJECT_DIR$/.idea/vcs.xml" />
-        <option value="$PROJECT_DIR$/.idea/misc.xml" />
-        <option value="$PROJECT_DIR$/.idea/modules.xml" />
-      </list>
-    </option>
-  </component>
-  <component name="ProjectFrameBounds" extendedState="6">
-    <option name="x" value="-30" />
-    <option name="y" value="23" />
-    <option name="width" value="1680" />
-    <option name="height" value="973" />
-  </component>
-  <component name="ProjectView">
-    <navigator proportions="" version="1">
-      <foldersAlwaysOnTop value="true" />
-    </navigator>
-    <panes>
-      <pane id="ProjectPane">
-        <subPane>
-          <expand>
-            <path>
-              <item name="setup-ipsec-vpn" type="b2602c69:ProjectViewProjectNode" />
-              <item name="setup-ipsec-vpn" type="462c0819:PsiDirectoryNode" />
-            </path>
-          </expand>
-          <select />
-        </subPane>
-      </pane>
-      <pane id="Scope" />
-    </panes>
-  </component>
-  <component name="PropertiesComponent">
-    <property name="WebServerToolWindowFactoryState" value="true" />
-    <property name="configurable.Global.GOPATH.is.expanded" value="true" />
-    <property name="configurable.Project.GOPATH.is.expanded" value="true" />
-    <property name="go.gopath.indexing.explicitly.defined" value="true" />
-    <property name="go.import.settings.migrated" value="true" />
-    <property name="go.sdk.automatically.set" value="true" />
-    <property name="last_opened_file_path" value="$USER_HOME$" />
-    <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
-    <property name="nodejs_npm_path_reset_for_default_project" value="true" />
-    <property name="settings.editor.selected.configurable" value="Errors" />
-  </component>
-  <component name="RunDashboard">
-    <option name="ruleStates">
-      <list>
-        <RuleState>
-          <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
-        </RuleState>
-        <RuleState>
-          <option name="name" value="StatusDashboardGroupingRule" />
-        </RuleState>
-      </list>
-    </option>
-  </component>
-  <component name="ToolWindowManager">
-    <frame x="0" y="23" width="1680" height="973" extended-state="6" />
-    <editor active="true" />
-    <layout>
-      <window_info id="Favorites" side_tool="true" />
-      <window_info active="true" content_ui="combo" id="Project" order="0" visible="true" weight="0.24969475" />
-      <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
-      <window_info anchor="bottom" id="Docker" show_stripe_button="false" />
-      <window_info anchor="bottom" id="Database Changes" />
-      <window_info anchor="bottom" id="Version Control" />
-      <window_info anchor="bottom" id="Terminal" />
-      <window_info anchor="bottom" id="Event Log" side_tool="true" />
-      <window_info anchor="bottom" id="Message" order="0" />
-      <window_info anchor="bottom" id="Find" order="1" />
-      <window_info anchor="bottom" id="Run" order="2" />
-      <window_info anchor="bottom" id="Debug" order="3" weight="0.4" />
-      <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
-      <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
-      <window_info anchor="bottom" id="TODO" order="6" />
-      <window_info anchor="right" id="Remote Host" />
-      <window_info anchor="right" id="Database" />
-      <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
-      <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
-      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" weight="0.25" />
-    </layout>
-  </component>
-  <component name="TypeScriptGeneratedFilesManager">
-    <option name="version" value="1" />
-  </component>
-  <component name="editorHistoryManager">
-    <entry file="file://$PROJECT_DIR$/docs/clients.md">
-      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
-        <state split_layout="SPLIT">
-          <first_editor relative-caret-position="430">
-            <caret line="419" column="6" selection-start-line="419" selection-start-column="6" selection-end-line="419" selection-end-column="6" />
-          </first_editor>
-          <second_editor />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/docs/clients-zh.md">
-      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
-        <state split_layout="SPLIT">
-          <first_editor relative-caret-position="289">
-            <caret line="185" column="45" selection-start-line="185" selection-start-column="45" selection-end-line="185" selection-end-column="45" />
-          </first_editor>
-          <second_editor />
-        </state>
-      </provider>
-    </entry>
-  </component>
-  <component name="masterDetails">
-    <states>
-      <state key="Copyright.UI">
-        <settings>
-          <splitter-proportions>
-            <option name="proportions">
-              <list>
-                <option value="0.2" />
-              </list>
-            </option>
-          </splitter-proportions>
-        </settings>
-      </state>
-      <state key="ScopeChooserConfigurable.UI">
-        <settings>
-          <splitter-proportions>
-            <option name="proportions">
-              <list>
-                <option value="0.2" />
-              </list>
-            </option>
-          </splitter-proportions>
-        </settings>
-      </state>
-    </states>
-  </component>
-</project>
\ No newline at end of file