deploy directly to GCE

Signed-off-by: Jason Hall <jason@chainguard.dev>

docs/cost.md

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+# Cost Analysis: GCE VM + TCP Load Balancer Architecture
+
+Based on the current GCE VM with TCP Load Balancer architecture, estimated costs:
+
+## Minimum Monthly Cost (No Traffic)
+
+**Compute Engine VM:**
+- 1 × e2-micro instance (1 vCPU, 1GB RAM): ~$6-8/month
+- Persistent disk (10GB standard): ~$0.40/month
+
+**TCP Load Balancer:**
+- Global Network Load Balancer with forwarding rules: ~$18-22/month
+- Health check service: ~$0.50/month
+
+**Other Resources (minimal cost):**
+- DNS zone and records: ~$0.50/month  
+- Secret Manager (2 secrets): ~$0.06/month
+- Container Registry storage: ~$0.10/month
+
+**Total estimated minimum cost: ~$25-31/month**
+
+The TCP Load Balancer remains the largest cost component (~70% of total). However, this architecture is more cost-effective than the previous Cloud Run + GKE setup by eliminating the GKE Autopilot cluster overhead.
+
+## Usage-Based Costs
+
+**VM Instance Scaling:**
+- Base e2-micro handles ~50-100 concurrent SSH sessions efficiently
+- For higher load, can scale up to larger machine types:
+  - e2-small (2 vCPU, 2GB): ~$12-16/month
+  - e2-medium (2 vCPU, 4GB): ~$24-32/month
+
+**Per-Connection Costs:**
+Since the VM runs 24/7, marginal cost per additional SSH connection is minimal until CPU/memory limits are reached.
+
+**Example Scaling Scenarios:**
+- 50 concurrent users: Base e2-micro (~$25-31/month total)
+- 150 concurrent users: e2-small (~$30-38/month total)  
+- 500+ concurrent users: e2-medium + load balancer (~$42-54/month total)
+
+## Cost Advantages vs Previous Architecture
+
+**Eliminated Costs:**
+- GKE Autopilot cluster management fees
+- Multiple pod overhead
+- WebSocket proxy layer complexity
+
+**Simplified Pricing:**
+- Predictable monthly VM cost regardless of session count
+- Direct SSH connections without proxy overhead
+- Single-instance architecture easier to monitor and optimize
+
+## High-Scale Considerations
+
+For very high usage (1000+ concurrent users), consider:
+- Auto-scaling instance groups with multiple VMs
+- Regional distribution for latency optimization
+- Cost would scale roughly linearly: ~$50-100 per 1000 concurrent users
+
+The current architecture provides excellent cost efficiency for small-to-medium scale deployments while maintaining the flexibility to scale up cost-effectively.