Configure build and start for Fastify

Summary

Configure build and start for a Fastify app on Ample. Fastify must listen with host 0.0.0.0 on process.env.PORT. Ample detects the runtime, installs dependencies, runs the build when present and starts the app on the node-22 template behind a public HTTPS URL.

Infrastructure requirements

• Compute: verified (Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.)

Prerequisites

• A package.json with build and start scripts
• A server that listens on process.env.PORT and 0.0.0.0
• An Ample account token with servers:write

Exact tested configuration

• template: node-22
• runtime: node
• size: s-1vcpu-1gb
• install: npm install
• build: npm run build --if-present
• start: npm run start

Steps

1. Make the start command bind correctly. Fastify must listen with host 0.0.0.0 on process.env.PORT.

2. Deploy. Run the existing synchronous deploy once from the project directory and read the result. Exit 0 is live, 1 is failed, 2 is blocked on a required preflight action. Re-running with no change is a content-addressed no-op.

   ample deploy . --name <app-name> --public --format json
   

3. Verify. Fetch the live URL and run the success checks below. On failure read the build log, then the runtime log, fix the cause and deploy again; do not blind-retry.

   ample logs <deployment_id> --kind build
   

Tested examples

• fastify-basic canary (tests/deploy-canaries/fastify-basic): Minimal Fastify server deployed with the detected npm commands.

Success checks

• page or root route responds (/ on the live URL, expect ample canary fastify basic)

Limitations

• Verified on the node-22 template at s-1vcpu-1gb; other templates and sizes are not verified by this recipe.
• Region, compliance attestations and request-duration limits are unknown and not claimed.
• Apps auto-pause when idle and wake on the next request; always-on is an operator setting, not a plan feature.

Cost estimate

Estimated 5.00 USD per month (size prices from pricing.toml at build revision a1b8c38919e59cd035ebabaced73cf84ece24371).

• app server x1 s-1vcpu-1gb: 5.00 USD

Apps and managed databases auto-pause when idle; the estimate is the always-on monthly price of the tested sizes. Plan quotas and budgets apply.

Verification evidence

• canary_run on 2026-09-19T23:55:33Z at revision 1764076-tls-account-903d345: Fastify app deployed on node-22 and served the expected response. (expires 2027-03-18T23:55:33Z)

Last verified: 2026-09-19T23:55:33Z

Execution binding

MCP tool ample_deploy (registry mcp:ample_deploy), schema hash 876465fce906da0c observed 2026-09-20T01:55:48.667900+00:00 at revision 199ff1dfd526, binding state current, required scopes: servers:write.