Bump node from 18.18.0-alpine to 21.6.2-alpine

Bumps node from 18.18.0-alpine to 21.6.2-alpine.

---
updated-dependencies:
- dependency-name: node
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Dockerfile

@@ -1,5 +1,5 @@
 # Install dependencies only when needed
-FROM node:18.18.0-alpine AS base
+FROM node:21.6.2-alpine AS base
 
 # Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
 # hadolint ignore=DL3018
@@ -11,7 +11,7 @@ COPY package.json package-lock.json ./
 RUN npm ci
 
 # Rebuild the source code only when needed
-FROM node:18.18.0-alpine AS builder
+FROM node:21.6.2-alpine AS builder
 WORKDIR /app
 
 COPY --from=base /app/node_modules ./node_modules
@@ -25,7 +25,7 @@ ENV DOMAIN=$DOMAIN
 RUN npm run prisma:generate_client && \
     npm run build
 
-FROM node:18.18.0-alpine AS prod_builder
+FROM node:21.6.2-alpine AS prod_builder
 WORKDIR /app
 
 ENV NODE_ENV production
@@ -38,7 +38,7 @@ RUN npm install && \
     cp -R node_modules prod_node_modules
 
 # Production image, copy all the files and run next
-FROM node:18.18.0-alpine AS runner
+FROM node:21.6.2-alpine AS runner
 RUN apk add --update --no-cache curl=8.4.0-r0
 
 WORKDIR /app