Add Mode6Test: copy of Mode5Test running on port 3000

Dockerfile.backend

@@ -0,0 +1,41 @@
+# Backend Dockerfile - Bun Runtime with Hono Framework
+# Optimized for production deployment
+
+FROM oven/bun:latest as builder
+
+# Set working directory
+WORKDIR /app
+
+# Copy backend source code
+COPY Mode3Test/backend ./backend
+COPY Mode3Test/package.json .
+COPY Mode3Test/bunfig.toml .
+
+# Install dependencies
+RUN bun install --production
+
+# Build step (if needed)
+# RUN bun run build
+
+# Runtime stage
+FROM oven/bun:latest
+
+WORKDIR /app
+
+# Copy from builder
+COPY --from=builder /app ./
+
+# Set environment variables
+ENV NODE_ENV=production
+ENV PORT=3005
+ENV LOG_LEVEL=info
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD bun run --eval "fetch('http://localhost:3005/health').then(r => r.status === 200 ? process.exit(0) : process.exit(1))" || exit 1
+
+# Expose port
+EXPOSE 3005
+
+# Start application
+CMD ["bun", "run", "dev"]