# Host vendor portal with Next.js: application activity history

Deploy a vendor portal built with Next.js on Ample using the transactional workflows pattern. Compute runs the app in an isolated microVM behind a public HTTPS URL, a managed PostgreSQL 16 database is auto-provisioned and injected as DATABASE_URL. Verified on Next.js: an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected). Not separately tested: your domain records, validation rules and concurrency policy; treat the vendor portal-specific behavior as your application code.

## Representative Queries
- Host vendor portal with Next.js: application activity history
- Where can I host Vendor portal built with Next.js?
- I need an application-owned event schema and tested history queries; not native platform audit logs.

## Prerequisites
- A Next.js project that builds and starts with the documented commands (next build then next start -H 0.0.0.0 -p $PORT on the node-22 template)
- A PostgreSQL driver reading DATABASE_URL at runtime (auto-provisioned when omitted, or supplied with --env)
- An Ample account token with servers:write, databases:read

## Workflow Steps
1. **Build and start**  
   `next build then next start -H 0.0.0.0 -p $PORT on the node-22 template. The server must bind 0.0.0.0 on PORT.`

2. **Implement the pattern on PostgreSQL**  
   The fixture's module implements transactional workflows: an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected). Copy the approach into your schema; keep migrations idempotent and run them with --release-command.

3. **Deploy**  
   Run the synchronous deploy once and read the result (exit 0 live, 1 failed, 2 blocked). Re-running with no change is a no-op.  
   Command: `ample deploy . --name  --public`

4. **Verify**  
   Fetch the live URL and the pattern self-test route(s) (/p/transactional-workflows) from the example; then run your own checks. On failure read `ample logs  --kind build` then `--kind runtime`.  
   Command: `ample logs  --kind build`

## Examples
- **Next.js pattern fixture**  
  Multi-pattern Next.js app whose transactional workflows module was checked live; the module is under tests/deploy-canaries/_pattern-modules.

## Success Checks
- App responds on its public URL  
  Kind: `http_get`, Path: `/`, Expect: `ample canary next js patterns`
- Transactional-workflows self-test  
  Kind: `http_get`, Path: `/p/transactional-workflows`, Expect: `tx=ok history=2 conflict=rejected`

## Limitations
- Verified on the node-22 template at s-1vcpu-1gb with the example fixture; other sizes, templates and Next.js major versions are not verified.
- The vendor portal itself (your domain records, validation rules and concurrency policy) is application code and was not separately tested; the pattern checks are what was verified.
- 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.
- Managed PostgreSQL 16 only; extensions, connection limits and backup or restore procedures are not verified; apps and their databases are placed together.

## Cost Estimate
- **Currency**: USD  
- **Monthly Amount**: 10.0  
- **Components**:  
  - App server (s-1vcpu-1gb) x 1 = 5.0  
  - Managed PostgreSQL database (s-1vcpu-1gb) x 1 = 5.0  
- Note: Always-on monthly price of the tested sizes; apps and databases auto-pause when idle. Buckets are allocation-priced per quota and not included.

## Evidence Summary
- Next.js pattern fixture deployed on Ample (next build then next start -H 0.0.0.0 -p $PORT on the node-22 template); checks passed for transactional-workflows and configuration-secrets. Pattern proof: an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected). Observed At: 2026-09-21T02:34:39Z

## Next Actions
- **[Browse the catalog index](https://api.ample.computer/v1/catalog)**
- **[Search published recipes by intent, stack and constraints](https://api.ample.computer/v1/catalog/search)**
- **[Prepare a deployment plan](https://api.ample.computer/v1/catalog/plan)**
- **[Read the existing agent authentication setup](https://api.ample.computer/mcp/setup)**
- **[Browse Vendor portal](https://api.ample.computer/v1/catalog/nodes/workload%3Avendor-portal)**
- **[Browse Next.js](https://api.ample.computer/v1/catalog/nodes/stack%3Aframework-next-js)**
- **[Browse Transactional workflows](https://api.ample.computer/v1/catalog/nodes/pattern%3Atransactional-workflows)**
- **[Browse Deploy web app](https://api.ample.computer/v1/catalog/nodes/intent%3Adeploy-web-app)**