feat(frontend): simplication de la conf nginx + ajout du stage pour le runner dans le dockerfile

apps/frontend/Dockerfile

@@ -1,5 +1,9 @@
+# ==================
+# Étape 1 : Build
+# ==================
+
 # Image pour frontend
-FROM node:24-alpine
+FROM dhi.io/node:24-alpine3.22-dev AS builder
 
 WORKDIR /app
 
@@ -12,4 +16,32 @@ RUN --mount=type=cache,target=/root/.npm npm ci
 COPY . .
 
 # Build 
-RUN npm run build
+RUN npm run build
+
+# ==================
+# Étape 2 : Runner
+# ==================
+
+
+FROM dhi.io/nginx:1.28.0-alpine3.21-dev AS runner
+
+# Copie de la configuration de nginx
+COPY --chown=nginx:nginx nginx.conf /etc/nginx/nginx.conf
+
+# Copy the static build output from the build stage to Nginx's default HTML serving directory
+COPY --chown=nginx:nginx --from=builder /app/dist/*/browser /usr/share/nginx/html
+
+# Create necessary directories with proper permissions for nginx
+RUN mkdir -p /var/log/nginx /var/cache/nginx && \
+    chown -R nginx:nginx /var/log/nginx /var/cache/nginx /usr/share/nginx/html
+
+# Use a non-root user for security best practices
+USER nginx
+
+# Frontend : port 3000
+# Backend : port 8000
+EXPOSE 3000
+
+# Start Nginx directly with custom config
+ENTRYPOINT ["nginx", "-c", "/etc/nginx/nginx.conf"]
+CMD ["-g", "daemon off;"]