chore(deps): bump node from 18-alpine to 21-alpine

Bumps node from 18-alpine to 21-alpine.

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

Signed-off-by: dependabot[bot] <[email protected]>

Dockerfile

@@ -1,11 +1,11 @@
-FROM node:18-alpine AS deps
+FROM node:21-alpine AS deps
 RUN apk add --no-cache libc6-compat
 WORKDIR /app
 
 COPY package.json package-lock.json ./
 RUN  npm install --production
 
-FROM node:18-alpine AS builder
+FROM node:21-alpine AS builder
 WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
@@ -14,7 +14,7 @@ ENV NEXT_TELEMETRY_DISABLED 1
 
 RUN npm run build
 
-FROM node:18-alpine AS runner
+FROM node:21-alpine AS runner
 RUN apk add --no-cache git
 WORKDIR /app