Fixed missing CSS on published site = adding bundling.

Justification:
When published (under Release configuration) in layout there is just app.min.css. We can either add also other minified CSS there (components, headers,...) or add one bundled and minified 8KB css.

src/Web/Views/Shared/_Layout.cshtml

@@ -20,7 +20,7 @@
         <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.5/css/bootstrap.min.css"
               asp-fallback-href="~/lib/bootstrap/dist/css/bootstrap.min.css"
               asp-fallback-test-class="sr-only" asp-fallback-test-property="position" asp-fallback-test-value="absolute" />
-        <link rel="stylesheet" href="~/css/app.min.css" asp-append-version="true" />
+        <link rel="stylesheet" href="~/css/site.min.css" asp-append-version="true" />
     </environment>
 </head>
 <body>

src/Web/Web.csproj

@@ -14,6 +14,7 @@
 
   <ItemGroup>
     <PackageReference Include="Ardalis.ListStartupServices" Version="1.1.3" />
+    <PackageReference Include="BuildBundlerMinifier" Version="2.9.406" Condition="'$(Configuration)'=='Release'" PrivateAssets="All" />
     <PackageReference Include="Microsoft.AspNetCore.App" />
     <PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.2.0" PrivateAssets="All" />
     <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.2.3" />

src/Web/bundleconfig.json

@@ -0,0 +1,27 @@
+[
+  {
+    "outputFileName": "wwwroot/css/site.min.css",
+    "inputFiles": [
+      "wwwroot/css/app.css",
+      "wwwroot/css/app.component.css",
+      "wwwroot/css/shared/components/header/header.css",
+      "wwwroot/css/shared/components/identity/identity.css",
+      "wwwroot/css/shared/components/pager/pager.css",
+      "wwwroot/css/basket/basket.component.css",
+      "wwwroot/css/basket/basket-status/basket-status.component.css",
+      "wwwroot/css/catalog/catalog.component.css",
+      "wwwroot/css/orders/orders.component.css"
+    ]
+  },
+  {
+    "outputFileName": "wwwroot/js/site.min.js",
+    "inputFiles": [
+      "wwwroot/js/site.js"
+    ],
+    "minify": {
+      "enabled": true,
+      "renameLocals": true
+    },
+    "sourceMap": false
+  }
+]

src/Web/wwwroot/css/site.min.css

@@ -0,0 +1 @@
+@font-face{font-family:Montserrat;font-weight:400;src:url(".../fonts/Montserrat-Regular.eot?") format("eot"),url("../fonts/Montserrat-Regular.woff") format("woff"),url("../fonts/Montserrat-Regular.ttf") format("truetype"),url("../fonts/Montserrat-Regular.svg#Montserrat") format("svg")}@font-face{font-family:Montserrat;font-weight:700;src:url("../fonts/Montserrat-Bold.eot?") format("eot"),url("../fonts/Montserrat-Bold.woff") format("woff"),url("../fonts/Montserrat-Bold.ttf") format("truetype"),url("../fonts/Montserrat-Bold.svg#Montserrat") format("svg")}html,body{font-family:Montserrat,sans-serif;font-size:16px;font-weight:400;z-index:10}*,*::after,*::before{box-sizing:border-box}.preloading{color:#00a69c;display:block;font-size:1.5rem;left:50%;position:fixed;top:50%;transform:translate(-50%,-50%)}select::-ms-expand{display:none}@media screen and (min-width:992px){.form-input{max-width:360px;width:360px}}.form-input{border-radius:0;height:45px;padding:10px}.form-input-small{max-width:100px !important}.form-input-medium{width:150px !important}.alert{padding-left:0}.alert-danger{background-color:transparent;border:0;color:#fb0d0d;font-size:12px}a,a:active,a:hover,a:visited{color:#000;text-decoration:none;transition:color .35s}a:hover,a:active{color:#75b918;transition:color .35s}.esh-app-footer{background-color:#000;border-top:1px solid #eee;margin-top:2.5rem;padding-bottom:2.5rem;padding-top:2.5rem;width:100%;bottom:0}.esh-app-footer-brand{height:50px;width:230px}.esh-app-header{margin:15px}.esh-app-wrapper{display:flex;min-height:100vh;flex-direction:column;justify-content:space-between}.esh-header{background-color:#00a69c;height:4rem}.esh-header-back{color:rgba(255,255,255,.5);line-height:4rem;text-decoration:none;text-transform:uppercase;transition:color .35s}.esh-header-back:hover{color:#fff;transition:color .35s}.esh-identity{line-height:3rem;position:relative;text-align:right}.esh-identity-section{display:inline-block;width:100%}.esh-identity-name{display:inline-block}.esh-identity-name--upper{text-transform:uppercase}@media screen and (max-width:768px){.esh-identity-name{font-size:.85rem}}.esh-identity-image{display:inline-block}.esh-identity-drop{background:#fff;height:10px;width:10rem;overflow:hidden;padding:.5rem;position:absolute;right:0;top:2.5rem;transition:height .35s}.esh-identity:hover .esh-identity-drop{border:1px solid #eee;height:10rem;transition:height .35s}.esh-identity-item{cursor:pointer;transition:color .35s}.esh-identity-item:hover{color:#75b918;transition:color .35s}.esh-pager-wrapper{padding-top:1rem;text-align:center}.esh-pager-item{margin:0 5vw}.esh-pager-item.is-disabled{opacity:.5;pointer-events:none}.esh-pager-item--navigable{cursor:pointer;display:inline-block}.esh-pager-item--navigable:hover{color:#83d01b}@media screen and (max-width:1280px){.esh-pager-item{font-size:.85rem}}@media screen and (max-width:1024px){.esh-pager-item{margin:0 2.5vw}}.esh-basket{min-height:80vh}.esh-basket-titles{padding-bottom:1rem;padding-top:2rem}.esh-basket-titles--clean{padding-bottom:0;padding-top:0}.esh-basket-title{text-transform:uppercase}.esh-basket-items--border{border-bottom:1px solid #eee;padding:.5rem 0}.esh-basket-items--border:last-of-type{border-color:transparent}.esh-basket-items-margin-left1{margin-left:1px}.esh-basket-item{font-size:1rem;font-weight:300}.esh-basket-item--middle{line-height:8rem}@media screen and (max-width:1024px){.esh-basket-item--middle{line-height:1rem}}.esh-basket-item--mark{color:#00a69c}.esh-basket-image{height:8rem}.esh-basket-input{line-height:1rem;width:100%}.esh-basket-checkout{background-color:#83d01b;border:0;border-radius:0;color:#fff;display:inline-block;font-size:1rem;font-weight:400;margin-top:1rem;padding:1rem 1.5rem;text-align:center;text-transform:uppercase;transition:all .35s}.esh-basket-checkout:hover{background-color:#4a760f;transition:all .35s}.esh-basketstatus{cursor:pointer;display:inline-block;float:right;position:relative;transition:all .35s}.esh-basketstatus.is-disabled{opacity:.5;pointer-events:none}.esh-basketstatus-image{height:36px;margin-top:.5rem}.esh-basketstatus-badge{background-color:#83d01b;border-radius:50%;color:#fff;display:block;height:1.5rem;left:50%;position:absolute;text-align:center;top:0;transform:translateX(-38%);transition:all .35s;width:1.5rem}.esh-basketstatus-badge-inoperative{background-color:#f00;border-radius:50%;color:#fff;display:block;height:1.5rem;left:50%;position:absolute;text-align:center;top:0;transform:translateX(-38%);transition:all .35s;width:1.5rem}.esh-basketstatus:hover .esh-basketstatus-badge{background-color:transparent;color:#75b918;transition:all .35s}.esh-catalog-hero{background-image:url("../images/main_banner.png");background-size:cover;height:260px;width:100%}.esh-catalog-title{position:relative;top:74.28571px}.esh-catalog-filters{background-color:#00a69c;height:65px}.esh-catalog-filter{-webkit-appearance:none;background-color:transparent;border-color:#00d9cc;color:#fff;cursor:pointer;marLine truncated