Refactor book management system:

- Updated .gitignore to exclude node_modules directory.
- Enhanced index.js with new endpoints for book fetching and checkout requests, integrating nodemailer and express-rate-limit for email notifications and request management.
- Added functionality to confirm book presence in the library and improved error handling for external book sources.
- Updated package.json and package-lock.json to include new dependencies (nodemailer, express-rate-limit) and their respective versions.
- Modified public HTML and JavaScript files to support new features, including a confirm mode for book scanning and improved UI elements.
- Updated styles for better user experience in the library interface.

public/styles.css

@@ -3,6 +3,8 @@
     width: 100%;
     height: 400px;
     overflow: hidden;
+    border: 2px solid #000;
+    background-color: #c0c0c0;
 }
 
 canvas.drawing, canvas.drawingBuffer {
@@ -13,18 +15,109 @@ canvas.drawing, canvas.drawingBuffer {
 
 #book-info {
     margin-top: 20px;
+    font-family: 'Courier New', Courier, monospace;
+    background-color: #f0f0f0;
+    border: 1px solid #000;
+    padding: 10px;
 }
 
 #prompt {
     display: none;
     margin-top: 20px;
+    font-family: 'Courier New', Courier, monospace;
+    background-color: #f0f0f0;
+    border: 1px solid #000;
+    padding: 10px;
 }
 
 #prompt-message {
     font-weight: bold;
+    font-family: 'Courier New', Courier, monospace;
+    color: #800000;
 }
 
 #book-title, #book-author, #book-desc {
     margin-top: 10px;
     font-size: 16px;
+    font-family: 'Courier New', Courier, monospace;
+    color: #800000;
+}
+body {
+    font-family: 'Courier New', Courier, monospace;
+    background-color: #ddd4b0;
+    color: #000;
+    margin: 0;
+    padding: 0;
+}
+
+h1 {
+    text-align: center;
+    color: #800000;
+    font-size: 24px;
+    margin-top: 20px;
+}
+
+#search-bar {
+    display: block;
+    margin: 20px auto;
+    width: 80%;
+    padding: 10px;
+    font-size: 16px;
+    border: 2px solid #000;
+    background-color: #f0f0f0;
+}
+
+table {
+    width: 90%;
+    margin: 20px auto;
+    border-collapse: collapse;
+    background-color: #fff;
+}
+
+th, td {
+    border: 1px solid #000;
+    padding: 10px;
+    text-align: left;
+    font-size: 14px;
+}
+
+th {
+    background-color: #c0c0c0;
+    cursor: pointer;
+}
+
+th:hover {
+    background-color: #a0a0a0;
+}
+
+a {
+    color: #800000;
+    text-decoration: none;
+}
+
+a:hover {
+    text-decoration: underline;
+}
+
+#book-table-body tr:nth-child(even) {
+    background-color: #f0f0f0;
+}
+
+#book-table-body tr:nth-child(odd) {
+    background-color: #e0e0e0;
+}
+
+#book-table-body tr:hover {
+    background-color: #d0d0d0;
+}
+
+#book-info, #prompt, #book-title, #book-author, #book-desc, th, td, body {
+    font-size: 18px;
+    font-weight: bold;
+}
+
+#search-bar:focus {
+    outline-color: #800000;
+    outline-style: solid;
+    outline-width: 2px;
 }