Add publish profiles.

Source/MQTTnet.Server/Properties/PublishProfiles/FolderProfile.pubxml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+This file is used by the publish/package process of your Web project. You can customize the behavior of this process
+by editing this MSBuild file. In order to learn more about this please visit https://go.microsoft.com/fwlink/?LinkID=208121. 
+-->
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <WebPublishMethod>FileSystem</WebPublishMethod>
+    <PublishProvider>FileSystem</PublishProvider>
+    <LastUsedBuildConfiguration>Release</LastUsedBuildConfiguration>
+    <LastUsedPlatform>Any CPU</LastUsedPlatform>
+    <SiteUrlToLaunchAfterPublish />
+    <LaunchSiteAfterPublish>True</LaunchSiteAfterPublish>
+    <ExcludeApp_Data>False</ExcludeApp_Data>
+    <ProjectGuid>5699fb8c-838c-4ab0-80a5-9ca809f9b65b</ProjectGuid>
+    <publishUrl>bin\publish\</publishUrl>
+    <DeleteExistingFiles>False</DeleteExistingFiles>
+  </PropertyGroup>
+</Project>

Source/MQTTnet.Server/Properties/PublishProfiles/Linux_x64.pubxml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+This file is used by the publish/package process of your Web project. You can customize the behavior of this process
+by editing this MSBuild file. In order to learn more about this please visit https://go.microsoft.com/fwlink/?LinkID=208121. 
+-->
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <WebPublishMethod>FileSystem</WebPublishMethod>
+    <PublishProvider>FileSystem</PublishProvider>
+    <LastUsedBuildConfiguration>Release</LastUsedBuildConfiguration>
+    <LastUsedPlatform>x64</LastUsedPlatform>
+    <SiteUrlToLaunchAfterPublish />
+    <LaunchSiteAfterPublish>True</LaunchSiteAfterPublish>
+    <ExcludeApp_Data>False</ExcludeApp_Data>
+    <ProjectGuid>5699fb8c-838c-4ab0-80a5-9ca809f9b65b</ProjectGuid>
+    <publishUrl>bin\linux_x64</publishUrl>
+    <DeleteExistingFiles>False</DeleteExistingFiles>
+    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <RuntimeIdentifier>linux-x64</RuntimeIdentifier>
+    <SelfContained>true</SelfContained>
+    <_IsPortable>false</_IsPortable>
+  </PropertyGroup>
+</Project>