Add style css for images and {alert} for blue boxes

Author: mrgiles

static/css/style_tutorials.css

@@ -0,0 +1,20 @@
+/* styles for kubernetes-basics tutorials */
+.tutorials-modules {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 20px;
+    justify-content: space-between;
+}
+
+.module {
+    width: 30%;
+    text-align: center;
+}
+
+.module img {
+    width: 100%;
+}
+
+.module h5 {
+    margin: 10px 0 0;
+}