Added tracking code form.

components/common/Button.js

@@ -0,0 +1,30 @@
+import React from 'react';
+import classNames from 'classnames';
+import Icon from './Icon';
+import styles from './Button.module.css';
+
+export default function Button({
+  type = 'button',
+  icon,
+  size,
+  variant,
+  children,
+  className,
+  ...props
+}) {
+  return (
+    <button
+      type={type}
+      className={classNames(styles.button, className, {
+        [styles.small]: size === 'S',
+        [styles.large]: size === 'L',
+        [styles.action]: variant === 'action',
+        [styles.danger]: variant === 'danger',
+      })}
+      {...props}
+    >
+      {icon && <Icon icon={icon} size={size} />}
+      {children}
+    </button>
+  );
+}