feat(docker): add docker configuration files and update styles

refactor: convert script tags to link tags for stylesheets in HTML files
fix: update PDF download to use Uint8Array for blob creation
style: reformat CSS file for better readability and organization

src/js/logic/split-in-half.ts

@@ -42,7 +42,7 @@ export async function splitInHalf() {
         }
 
         const newPdfBytes = await newPdfDoc.save();
-        downloadFile(new Blob([newPdfBytes], { type: 'application/pdf' }), 'split-half.pdf');
+        downloadFile(new Blob([new Uint8Array(newPdfBytes)], { type: 'application/pdf' }), 'split-half.pdf');
 
     } catch (e) {
         console.error(e);