新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch03/docker-images/numbers/numbers-web-v2/Dockerfile

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+FROM kiamol/ch03-numbers-web
+
+COPY numbers-web-v2/site.css /app/wwwroot/css/site.css

learn/learn-kubernetes-master/kiamol/ch03/docker-images/numbers/numbers-web-v2/site.css

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+@import url('open-iconic/font/css/open-iconic-bootstrap.min.css');
+
+html, body {
+    font-family: 'Comic Sans MS', cursive, sans-serif;
+    font-size: 20px;
+}
+
+a, .btn-link {
+    color: #0366d6;
+}
+
+.btn-primary {
+  color: #fff;
+  background-color: #1b6ec2;
+  border-color: #1861ac;
+}
+
+app {
+    position: relative;
+    display: flex;
+    flex-direction: column;
+}
+
+.top-row {
+    height: 3.5rem;
+    display: flex;
+    align-items: center;
+}
+
+.new-item {
+    width: 500px;
+}
+
+.main {
+    flex: 1;
+    background-color: antiquewhite;
+}
+
+.main .top-row {
+    background-color:beige;
+    border-bottom: 1px solid #d6d5d5;
+    justify-content: flex-end;
+}
+
+.main .top-row > a {
+    margin-left: 1.5rem;
+}
+
+.sidebar {
+    background-image: linear-gradient(180deg, rgb(240,141,100) 0%, #770909 70%);
+}
+
+.sidebar .top-row {
+    background-color: rgba(0,0,0,0.4);
+}
+
+.sidebar .navbar-brand {
+    font-size: 1.1rem;
+}
+
+.sidebar .oi {
+    width: 2rem;
+    font-size: 1.1rem;
+    vertical-align: text-top;
+    top: -2px;
+}
+
+.nav-item {
+    font-size: 0.9rem;
+    padding-bottom: 0.5rem;
+}
+
+.nav-item:first-of-type {
+    padding-top: 1rem;
+}
+
+.nav-item:last-of-type {
+    padding-bottom: 1rem;
+}
+
+.nav-item a {
+    color: #d7d7d7;
+    border-radius: 4px;
+    height: 3rem;
+    display: flex;
+    align-items: center;
+    line-height: 3rem;
+}
+
+.nav-item a.active {
+    background-color: rgba(255,255,255,0.25);
+    color: white;
+}
+
+.nav-item a:hover {
+    background-color: rgba(255,255,255,0.1);
+    color: white;
+}
+
+.content {
+    padding-top: 1.1rem;
+}
+
+.navbar-toggler {
+    background-color: rgba(255, 255, 255, 0.1);
+}
+
+.valid.modified:not([type=checkbox]) {
+    outline: 1px solid #26b050;
+}
+
+.invalid {
+    outline: 1px solid red;
+}
+
+.validation-message {
+    color: red;
+}
+
+@media (max-width: 767.98px) {
+    .main .top-row {
+        display: none;
+    }
+}
+
+@media (min-width: 768px) {
+    app {
+        flex-direction: row;
+    }
+
+    .sidebar {
+        width: 250px;
+        height: 100vh;
+        position: sticky;
+        top: 0;
+    }
+
+    .main .top-row {
+        position: sticky;
+        top: 0;
+    }
+
+    .main > div {
+        padding-left: 2rem !important;
+        padding-right: 1.5rem !important;
+    }
+
+    .navbar-toggler {
+        display: none;
+    }
+
+    .sidebar .collapse {
+        /* Never collapse the sidebar for wide screens */
+        display: block;
+    }
+}