refactor: remove Nginx and serve application via Node + Vite preview

Dockerfile

@@ -1,9 +1,5 @@
-# Multi-stage production Dockerfile for gameno-front (Vue 3 + Vite SPA)
-
-# ------------------------------------------------------------------------------
-# Stage 1: Build the Vite static application
-# ------------------------------------------------------------------------------
-FROM node:22-alpine AS build
+# Production Dockerfile for gameno-front (Node + Vite)
+FROM node:22-alpine
 
 WORKDIR /app
 
@@ -18,44 +14,13 @@ COPY . .
 ARG VITE_API_BASE_URL
 ENV VITE_API_BASE_URL=${VITE_API_BASE_URL}
 
-# Build static assets to /app/dist
+# Build static application
 RUN npm run build
 
-# ------------------------------------------------------------------------------
-# Stage 2: Production web server serving static files via Nginx
-# ------------------------------------------------------------------------------
-FROM nginx:1.27-alpine AS production
+EXPOSE 5174
 
-# Inline Nginx configuration for SPA routing, gzip, caching, and healthcheck
-RUN printf 'server {\n\
-    listen 80;\n\
-    server_name localhost;\n\
-    root /usr/share/nginx/html;\n\
-    index index.html;\n\
-    gzip on;\n\
-    gzip_types text/plain text/css text/javascript application/javascript application/json image/svg+xml;\n\
-    location ~ ^/(healthz|health)$ {\n\
-        access_log off;\n\
-        default_type text/plain;\n\
-        return 200 "OK";\n\
-    }\n\
-    location / {\n\
-        try_files $uri $uri/ /index.html;\n\
-    }\n\
-    location ~* \\.(?:css|js|jpg|jpeg|gif|png|ico|svg|woff|woff2|ttf)$ {\n\
-        expires 1y;\n\
-        access_log off;\n\
-        add_header Cache-Control "public, immutable";\n\
-    }\n\
-}\n' > /etc/nginx/conf.d/default.conf
+# Healthcheck targeting port 5174
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+  CMD wget --no-verbose --tries=1 --spider http://localhost:5174/ || exit 1
 
-# Copy compiled static assets from build stage
-COPY --from=build /app/dist /usr/share/nginx/html
-
-EXPOSE 80
-
-# Health check endpoint for Docker & Coolify targeting /healthz
-HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
-  CMD wget --no-verbose --tries=1 --spider http://localhost:80/healthz || exit 1
-
-CMD ["nginx", "-g", "daemon off;"]
+CMD ["npx", "vite", "preview", "--host", "0.0.0.0", "--port", "5174"]