feat: cloudflare browser rendering for pdf generation (#562)

* feat: cloudflare browser rendering for pdf generation

* feat: sync env

* fix: imports correction & remove puppeteer

* update return type

* update dependencies

---------

Co-authored-by: Rotimi Best <best@classroomio.com>

apps/backend/src/utils/cloudflare.ts

@@ -0,0 +1,27 @@
+import { CLOUDFLARE } from '$src/constants';
+
+export const getCloudflarePdfBuffer = async (html: string, styles?: string) => {
+  console.log('Generating PDF with Cloudflare API...');
+  try {
+    const pdfResponse = await fetch(
+      `https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE.CONFIGS.ACCOUNT_ID}/browser-rendering/pdf`,
+      {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          Authorization: `Bearer ${CLOUDFLARE.CONFIGS.ACCESS_KEY}`
+        },
+        body: JSON.stringify({
+          html: html,
+          addStyleTag: [{ content: `${styles}` }]
+        })
+      }
+    );
+
+    console.log('PDF response status:', pdfResponse.status);
+    return pdfResponse;
+  } catch (error) {
+    console.error('Error generating PDF:', error);
+    throw new Error(error instanceof Error ? error.message : 'Failed to generate PDF');
+  }
+};