ci: docker_tag=ext - Fix CI build with multi-stage Dockerfile

- Add multi-stage Dockerfile with 'ext' stage for CI compatibility
- Fix start-runtime.js to use 'npm start' instead of 'node server.js'
- Ensure image can be built with target stage 'ext' as expected by CI
- Maintain runtime environment variable injection capability

Dockerfile

@@ -1,5 +1,7 @@
-# Dockerfile optimisé pour la CI - build générique, variables au runtime
+# Dockerfile multi-stage pour la CI - build générique, variables au runtime
-FROM docker.io/library/debian:bookworm-slim
+
+# Stage de base
+FROM docker.io/library/debian:bookworm-slim AS base
 
 # Installation des dépendances système
 RUN apt-get update && apt-get upgrade -y && \
@@ -16,6 +18,9 @@ RUN curl -fsSL https://deb.nodesource.com/setup_19.x | bash - && \
 
 WORKDIR /leCoffre-front
 
+# Stage de build
+FROM base AS builder
+
 # Copie des fichiers de dépendances
 COPY package.json package-lock.json ./
 RUN npm install --no-audit --no-fund
@@ -47,15 +52,24 @@ ENV NEXT_PUBLIC_BACK_API_PROTOCOL=https \
 
 RUN npm run build
 
+# Stage de production (stage 'ext' pour la CI)
+FROM base AS ext
+
+# Copie des fichiers buildés depuis le stage builder
+COPY --from=builder /leCoffre-front/.next ./.next
+COPY --from=builder /leCoffre-front/public ./public
+COPY --from=builder /leCoffre-front/package.json ./package.json
+COPY --from=builder /leCoffre-front/node_modules ./node_modules
+
+# Copie du script de démarrage
+COPY start-runtime.js ./
+RUN chmod +x start-runtime.js
+
 # Configuration runtime
 EXPOSE 8080
 ENV NODE_ENV=production
 ENV PORT=8080
 
-# Copie du script de démarrage et permissions
-COPY start-runtime.js ./
-RUN chmod +x start-runtime.js
-
 # Utilisateur non-root
 RUN useradd -m -u 1000 lecoffreuser && \
     mkdir -p /leCoffre-front && chown -R lecoffreuser:lecoffreuser /leCoffre-front

start-runtime.js

@@ -34,7 +34,7 @@ const env = { ...defaultEnv, ...process.env };
 console.log('Starting Next.js with runtime environment variables...');
 
 // Démarrer Next.js avec les variables injectées
-const nextProcess = spawn('node', ['server.js'], {
+const nextProcess = spawn('npm', ['start'], {
   env: env,
   stdio: 'inherit',
   cwd: __dirname