Improve readability and Google indexing (#36)

* update README.md

* Update README.md

fixed for github compatible HTML

README.md

@@ -1,4 +1,5 @@
-<h1><img src="https://github.com/Frooodle/Stirling-PDF/blob/main/docs/stirling.png?raw=true"  width="60" height="60">tirling-PDF</h1>
+<p align="center"><img src="https://raw.githubusercontent.com/Frooodle/Stirling-PDF/main/docs/stirling.png" width="80" ><br><h1 align="center">Stirling-PDF</h1>
+</p>
 
 
 This is a locally hosted web application that allows you to perform various operations on PDF files, such as splitting and adding images.
@@ -34,7 +35,7 @@ I will support and fix/add things to this if there is a demand [Discord](https:/
 
 ## How to use
 
-### Locally 
+### Locally
 
 Prerequisites
 - Java 17 or later