add executablePath in browser generate anchoring proof

src/services/common/AnchoringProofService/AnchoringProofService.ts

@@ -22,8 +22,9 @@ export default class AnchoringProofService extends BaseService {
 	public async generate(data: AnchoringProofData): Promise<Buffer> {
 		const browser = await puppeteer.launch({
 			headless: "new",
+			executablePath: `/usr/bin/chromium`,
 			args: ["--no-sandbox", "--disable-setuid-sandbox"],
-		  });
+		});
 
 		const page = await browser.newPage();