⚡️(devx) switch devstack to node:22-alpine

The devstack was pulling the full `node:22` image, around 1.6 GB.
Switch to `node:22-alpine`, which is much smaller, to speed up the
devstack bootstrap time and reduce disk usage.

src/mail/bin/html-to-plain-text

@@ -1,5 +1,5 @@
-#!/usr/bin/env bash
-set -eo pipefail
+#!/bin/sh
+set -e
 # Run html-to-text to convert all html files to text files
 DIR_MAILS="../backend/core/templates/mail/"
 

src/mail/bin/mjml-to-html

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 # Run mjml command to convert all mjml templates to html files
 DIR_MAILS="../backend/core/templates/mail/html/"

src/mail/package.json

@@ -9,8 +9,8 @@
   },
   "private": true,
   "scripts": {
-    "build-mjml-to-html": "bash ./bin/mjml-to-html",
-    "build-html-to-plain-text": "bash ./bin/html-to-plain-text",
+    "build-mjml-to-html": "sh ./bin/mjml-to-html",
+    "build-html-to-plain-text": "sh ./bin/html-to-plain-text",
     "build": "npm run build-mjml-to-html && npm run build-html-to-plain-text"
   },
   "volta": {