Prepare application for production use, including health check

Adds production deployment configurations, a health check endpoint, and fixes voice command confidence level.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ff0be73b-afdd-4747-978b-bb8301fb0a82
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/9777c70b-fc38-4831-8d6b-78dfffe041b0/43bdd979-982d-4330-b7ca-c1484048813c.jpg

Dockerfile

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+# Production Dockerfile for MenAssist
+FROM node:18-alpine
+
+# Set working directory
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci --only=production
+
+# Copy application code
+COPY . .
+
+# Build the application
+RUN npm run build
+
+# Create non-root user
+RUN addgroup -g 1001 -S nodejs
+RUN adduser -S menassist -u 1001
+
+# Change ownership of the app directory
+RUN chown -R menassist:nodejs /app
+USER menassist
+
+# Expose port
+EXPOSE 5000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD curl -f http://localhost:5000/health || exit 1
+
+# Start the application
+CMD ["npm", "run", "start:prod"]