Add base kubernetes support 2

frontend/Dockerfile.kubernetes

@@ -0,0 +1,95 @@
+# Kubernetes-optimized Dockerfile for Frontend
+# Multi-stage build for production deployment
+
+# Stage 1: Build the application
+FROM node:18-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies including dev dependencies for building
+RUN npm ci --verbose && \
+    npm cache clean --force
+
+# Copy source code
+COPY . .
+
+# Build the application for production
+# This will use environment variables available at build time
+RUN npm run build
+
+# Stage 2: Production server with Nginx
+FROM nginx:1.25-alpine AS production
+
+# Install curl for health checks
+RUN apk add --no-cache curl
+
+# Remove default nginx configuration
+RUN rm /etc/nginx/conf.d/default.conf
+
+# Copy custom nginx configuration
+COPY nginx.conf /etc/nginx/conf.d/
+
+# Copy built application from builder stage
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+# Create a script to substitute environment variables at runtime
+COPY <<'EOF' /docker-entrypoint.d/30-substitute-env.sh
+#!/bin/sh
+set -e
+
+# Default values for environment variables
+export VITE_API_URL=${VITE_API_URL:-"http://gateway-service:8000"}
+export VITE_APP_TITLE=${VITE_APP_TITLE:-"PanIA Dashboard"}
+export VITE_APP_VERSION=${VITE_APP_VERSION:-"1.0.0"}
+
+# Create a runtime configuration file that can be loaded by the frontend
+cat > /usr/share/nginx/html/runtime-config.js << EOL
+window.__RUNTIME_CONFIG__ = {
+  VITE_API_URL: '${VITE_API_URL}',
+  VITE_APP_TITLE: '${VITE_APP_TITLE}',
+  VITE_APP_VERSION: '${VITE_APP_VERSION}'
+};
+EOL
+
+echo "Runtime configuration created with API URL: ${VITE_API_URL}"
+EOF
+
+# Make the script executable
+RUN chmod +x /docker-entrypoint.d/30-substitute-env.sh
+
+# Set proper permissions
+RUN chown -R nginx:nginx /usr/share/nginx/html && \
+    chown -R nginx:nginx /var/cache/nginx && \
+    chown -R nginx:nginx /var/log/nginx && \
+    chown -R nginx:nginx /etc/nginx/conf.d
+
+# Create nginx PID directory and fix permissions
+RUN mkdir -p /var/run/nginx /var/lib/nginx/tmp && \
+    chown -R nginx:nginx /var/run/nginx /var/lib/nginx
+
+# Custom nginx.conf for running as non-root
+RUN echo 'pid /var/run/nginx/nginx.pid;' > /etc/nginx/nginx.conf && \
+    echo 'events { worker_connections 1024; }' >> /etc/nginx/nginx.conf && \
+    echo 'http {' >> /etc/nginx/nginx.conf && \
+    echo '    include /etc/nginx/mime.types;' >> /etc/nginx/nginx.conf && \
+    echo '    default_type application/octet-stream;' >> /etc/nginx/nginx.conf && \
+    echo '    sendfile on;' >> /etc/nginx/nginx.conf && \
+    echo '    keepalive_timeout 65;' >> /etc/nginx/nginx.conf && \
+    echo '    include /etc/nginx/conf.d/*.conf;' >> /etc/nginx/nginx.conf && \
+    echo '}' >> /etc/nginx/nginx.conf
+
+# Switch to non-root user
+USER nginx
+
+# Expose port 3000 (to match current setup)
+EXPOSE 3000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
+  CMD curl -f http://localhost:3000/health || exit 1
+
+# Start nginx
+CMD ["nginx", "-g", "daemon off;"]