backend(themes.md): add new themes

Author: 0l1v3rr

docs/THEMES.md

@@ -260,4 +260,32 @@ If you would like to use other themes, and add one for yourself and others, plea
       <img src="https://github-readme-tech-stack.vercel.app/api/cards?title=android&lineCount=1&theme=android&line1=typescript,typescript,auto;express,express,61DAFB">
     </td>
   </tr>
+
+  <tr>
+    <td align="center"><code>discord</code></td>
+    <td>
+      <img src="https://github-readme-tech-stack.vercel.app/api/cards?theme=discord&title=discord&lineCount=1&line1=typescript,typescript,auto;express,express.js,61DAFB">
+    </td>
+  </tr>
+
+  <tr>
+    <td align="center"><code>gruvbox</code></td>
+    <td>
+      <img src="https://github-readme-tech-stack.vercel.app/api/cards?theme=gruvbox&title=gruvbox&lineCount=1&line1=typescript,typescript,auto;express,express.js,61DAFB">
+    </td>
+  </tr>
+
+  <tr>
+    <td align="center"><code>nord</code></td>
+    <td>
+      <img src="https://github-readme-tech-stack.vercel.app/api/cards?theme=nord&title=nord&lineCount=1&line1=typescript,typescript,auto;express,express.js,61DAFB">
+    </td>
+  </tr>
+
+  <tr>
+    <td align="center"><code>facebook</code></td>
+    <td>
+      <img src="https://github-readme-tech-stack.vercel.app/api/cards?theme=facebook&title=facebook&lineCount=1&line1=typescript,typescript,auto;express,express.js,61DAFB">
+    </td>
+  </tr>
 </table>

src/cards/themes.ts

@@ -228,6 +228,30 @@ themes.set("0l1v3rr", {
   titleColor: "#FF4747",
   badgeColor: "#10151F",
 });
+themes.set("discord", {
+  backgroundColor: "#202226",
+  borderColor: "#2f3137",
+  titleColor: "#5865f2",
+  badgeColor: "#2f3137",
+});
+themes.set("facebook", {
+  backgroundColor: "#1a191e",
+  borderColor: "#2a292e",
+  titleColor: "#1771e6",
+  badgeColor: "#2a292e",
+});
+themes.set("gruvbox", {
+  backgroundColor: "#232323",
+  borderColor: "#303030",
+  titleColor: "#fabe2b",
+  badgeColor: "#303030",
+});
+themes.set("nord", {
+  backgroundColor: "#2a313e",
+  borderColor: "#343C4D",
+  titleColor: "#82a2c2",
+  badgeColor: "#343C4D",
+});
 
 /**
  * Searches for the specified theme in the themes map.