Bump node from 21.7-alpine to 22.2-alpine

Bumps node from 21.7-alpine to 22.2-alpine.

---
updated-dependencies:
- dependency-name: node
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -1,5 +1,5 @@
 # Stage 1: Build static frontend assets.
-FROM node:21.7-alpine as build
+FROM node:22.2-alpine as build
 
 ENV NODE_ENV production