added header

src/app/app.component.css

@@ -0,0 +1,12 @@
+header{
+    background-color: rgb(37, 37, 37);
+    height: 50px;
+    font-size: 15pt;
+    color:white;
+    font-weight: bold;
+    text-align: center;
+}
+
+header p{
+    padding-top: 10px;
+}