add support for custom patches

debian/patches/0001-fix-email-Header-Footer-are-also-included-in-plainte.patch

+From ae8f700cb41c4ec5d69b7a8f84fce455067796b9 Mon Sep 17 00:00:00 2001
+From: marudor <marudor@marudor.de>
+Date: Fri, 10 Dec 2021 13:58:59 +0100
+Subject: [PATCH] fix(email): Header & Footer are also included in plaintext
+ emails
+
+ https://github.com/RocketChat/Rocket.Chat/pull/23928
+---
+ app/mailer/server/api.ts | 8 ++------
+ 1 file changed, 2 insertions(+), 6 deletions(-)
+
+diff --git a/app/mailer/server/api.ts b/app/mailer/server/api.ts
+index c59cd2151f..f97ce0823e 100644
+--- a/app/mailer/server/api.ts
++++ b/app/mailer/server/api.ts
+@@ -75,10 +75,6 @@ export const replaceEscaped = (str: string, data: { [key: string]: unknown } = {
+ };
+ 
+ export const wrap = (html: string, data: { [key: string]: unknown } = {}): string => {
+-	if (settings.get('email_plain_text_only')) {
+-		return replace(html, data);
+-	}
+-
+ 	if (!body) {
+ 		throw new Error('`body` is not set yet');
+ 	}
+@@ -190,8 +186,8 @@ export const send = ({
+ 		from,
+ 		replyTo,
+ 		subject: replace(subject, data),
+-		text: (text && replace(text, data))
+-			|| (html && stripHtml(replace(html, data)).result)
++		text: (text && stripHtml(wrap(text, data)).result)
++			|| (html && stripHtml(wrap(html, data)).result)
+ 			|| undefined,
+ 		html: html ? wrap(html, data) : undefined,
+ 		headers,
+-- 
+2.35.1
+

debian/patches/series

+0001-fix-email-Header-Footer-are-also-included-in-plainte.patch