Initial production deployment setup

- Production docker-compose with nginx support
- Nginx configuration for portal.monacousa.org
- Deployment script with backup/restore
- Gitea CI/CD workflow
- Fix CountryFlag reactivity for dropdown flags

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile

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+# Monaco USA Portal - SvelteKit Application
+# Multi-stage build for optimized production image
+
+# ============================================
+# Stage 1: Dependencies
+# ============================================
+FROM node:20-alpine AS deps
+WORKDIR /app
+
+# Copy package files
+COPY package.json package-lock.json* ./
+
+# Install dependencies
+RUN npm ci
+
+# ============================================
+# Stage 2: Builder
+# ============================================
+FROM node:20-alpine AS builder
+WORKDIR /app
+
+# Copy package files first
+COPY package.json package-lock.json* ./
+
+# Install dependencies - use npm install instead of npm ci to properly
+# resolve platform-specific optional dependencies (rollup binaries)
+RUN rm -rf node_modules && npm install --legacy-peer-deps
+
+# Copy source files
+COPY . .
+
+# Build arguments for environment variables
+ARG PUBLIC_SUPABASE_URL
+ARG PUBLIC_SUPABASE_ANON_KEY
+ARG SUPABASE_SERVICE_ROLE_KEY
+
+# Set environment variables for build
+ENV PUBLIC_SUPABASE_URL=$PUBLIC_SUPABASE_URL
+ENV PUBLIC_SUPABASE_ANON_KEY=$PUBLIC_SUPABASE_ANON_KEY
+ENV SUPABASE_SERVICE_ROLE_KEY=$SUPABASE_SERVICE_ROLE_KEY
+
+# Build the application
+RUN npm run build
+
+# Prune dev dependencies
+RUN npm prune --production
+
+# ============================================
+# Stage 3: Runner (Production)
+# ============================================
+FROM node:20-alpine AS runner
+WORKDIR /app
+
+# Set production environment
+ENV NODE_ENV=production
+
+# Create non-root user for security
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 sveltekit
+
+# Copy built application
+COPY --from=builder --chown=sveltekit:nodejs /app/build ./build
+COPY --from=builder --chown=sveltekit:nodejs /app/node_modules ./node_modules
+COPY --from=builder --chown=sveltekit:nodejs /app/package.json ./package.json
+
+# Switch to non-root user
+USER sveltekit
+
+# Expose port
+EXPOSE 3000
+
+# Set runtime environment variables
+ENV HOST=0.0.0.0
+ENV PORT=3000
+
+# Start the application
+CMD ["node", "build"]