Update README for contact, fix donation image URL

Author: tranxuanthang

README.md

@@ -54,6 +54,12 @@ Litecoin (LTC):
 ltc1q7texq5qsp59gclqlwf6asrqmhm98gruvz94a48
 ```
 
+## Contact
+
+If you prefer to contact by email:
+
+[[email protected]](mailto:[email protected])
+
 ## TODO
 
 - [x] Choose multiple directories

src/components/About.vue

@@ -40,7 +40,7 @@
                   <div class="mb-1">Buy Me a Coffee:</div>
                   <div>
                     <a href="https://www.buymeacoffee.com/thangtran" target="_blank">
-                      <img src="https://cdn.buymeacoffee.com/buttons/default-orange.png" alt="Buy Me A Coffee" height="41" width="174">
+                      <img src="@/assets/buy-me-a-coffee.png" alt="Buy Me A Coffee" height="41" width="174">
                     </a>
                   </div>
                 </div>