chore: pin Node 24.15.0 in Docker and CI

backend/Dockerfile

@@ -1,21 +1,22 @@
 # Byggas från projektets rot: docker build -f backend/Dockerfile -t recipe-importer-api:local .
 
 # Stage 1: Bygg applikationen
-FROM node:22-alpine AS builder
+FROM node:24.15.0-alpine AS builder
 WORKDIR /app
 
 # Kopiera backend-filer
 COPY backend/package.json ./
+COPY backend/package-lock.json ./
 COPY backend/src ./src
 COPY backend/tsconfig.json ./
 COPY backend/nest-cli.json ./
 
 # Köra npm install
-RUN npm install
+RUN npm ci
 RUN npm run build
 
 # Stage 2: Kör applikationen
-FROM node:22-alpine AS runner
+FROM node:24.15.0-alpine AS runner
 WORKDIR /app
 ENV NODE_ENV=production