feat: add production Dockerfile for gameno-front

Dockerfile

@@ -0,0 +1,56 @@
+# Multi-stage production Dockerfile for gameno-front (Vue 3 + Vite SPA)
+
+# ------------------------------------------------------------------------------
+# Stage 1: Build the Vite static application
+# ------------------------------------------------------------------------------
+FROM node:22-alpine AS build
+
+WORKDIR /app
+
+# Copy package descriptors and install dependencies
+COPY package*.json ./
+RUN npm ci
+
+# Copy application source code
+COPY . .
+
+# Build argument for API base URL (can be overridden at build time)
+ARG VITE_API_BASE_URL
+ENV VITE_API_BASE_URL=${VITE_API_BASE_URL}
+
+# Build static assets to /app/dist
+RUN npm run build
+
+# ------------------------------------------------------------------------------
+# Stage 2: Production web server serving static files via Nginx
+# ------------------------------------------------------------------------------
+FROM nginx:1.27-alpine AS production
+
+# Inline Nginx configuration for SPA routing, gzip, and caching
+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 / {\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
+
+# Copy compiled static assets from build stage
+COPY --from=build /app/dist /usr/share/nginx/html
+
+EXPOSE 80
+
+# Health check to ensure Nginx is responding on port 80
+HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
+  CMD wget --no-verbose --tries=1 --spider http://localhost:80/ || exit 1
+
+CMD ["nginx", "-g", "daemon off;"]