Add better documentation and scripts for air-gapped deployment

Created new helper scripts:
- quickstart-airgap.sh: One-command deployment for restricted environments
- check-ready.sh: Validates that pre-built files exist before deployment

Updated documentation:
- Enhanced Dockerfile.frontend.prebuilt with clearer error messages
- Updated DEPLOYMENT.md with step-by-step quick start guide
- Updated README.md to distinguish standard vs air-gapped deployment

Key improvements:
- Clear warning that build must happen BEFORE docker-compose
- Helper script that combines build + deployment steps
- Readiness check to catch missing pre-built files early
- Better instructions for test environments with restricted npm access

This addresses the common error where Docker fails because
frontend/dist/frontend/browser doesn't exist yet.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

README.md

@@ -36,7 +36,7 @@ A lightweight, cloud-native API for storing and querying test artifacts includin
 
 ## Quick Start
 
-### One-Command Setup
+### Standard Deployment (Internet Access)
 
 **Linux/macOS:**
 ```bash
@@ -53,6 +53,20 @@ A lightweight, cloud-native API for storing and querying test artifacts includin
 quickstart.bat
 ```
 
+### Air-Gapped/Restricted Environment Deployment
+
+**For environments with restricted npm access:**
+```bash
+./quickstart-airgap.sh
+```
+
+This script:
+1. Builds Angular locally (where npm works)
+2. Packages pre-built files into Docker
+3. Starts all services
+
+See [DEPLOYMENT.md](DEPLOYMENT.md) for detailed instructions.
+
 ### Manual Setup with Docker Compose
 
 1. Clone the repository: