Added FooterComponent and updated various UI elements

Introduced a new FooterComponent and integrated it into the application. Adjusted home page layout and refined styles for better consistency, including minor restructuring of CSS rules and HTML elements.

frontend/src/app/copy-ip/copy-ip.component.html

@@ -1,3 +1,3 @@
-<button type="button" style="margin-top: 50px;" class="button-outer" (click)="copyIpToClipboard()">
+<button type="button" class="button-outer" (click)="copyIpToClipboard()">
   <span class="button-inner">{{ displayText }}</span>
 </button>