add container class in html adn CSS

Author: RaeesStevens

Form-Controls/index.html

@@ -19,15 +19,16 @@ <h1>Product Pick</h1>
         <!-- 
           try writing out the requirements first as comments
         this will also help you fill in your PR message later-->
-      <div class="field-row">
+        <div class="container">
+        <div class="field-row">
         <label for="name">Customer Name:</label>
         <input type="text" id="name" minlength="2" pattern=".*\S.*\S.*" required>
 
         <label for="email">Customer Email:</label>
         <input type="email" id="email" name="email" required>
       </div>
 
-    <fieldset>
+  <fieldset>
         <legend>T-shirt color:</legend>
 
       <div class="color-options">
@@ -56,8 +57,8 @@ <h1>Product Pick</h1>
       </div>
 
       <input type="submit" value="Submit">
-
-    </fieldset>
+    </div>
+  </fieldset>
 
     </form>
     </main>