## Enforce private-file authorization for NestJS

### Summary
Private file access for a NestJS app on Ample. Verified on NestJS: a role-to-document access model with negative tests (401, 403) and an authorized private-bucket round-trip (private=ok). Build and start: `npm install`, `nest build` (TypeScript) then `node dist/main.js` on the node-22 template.

### Representative Queries
- Enforce private-file authorization for NestJS
- Where can I host Enforce private-file authorization built with NestJS?
- I need application identity integration, per-file access rules and negative authorization tests.

### Resource Requirements
- primitive:compute
- primitive:postgres
- primitive:s3-compatible-object-storage

### Infrastructure Requirements
1. **Compute**
   - Status: Verified
   - Summary: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.

2. **Postgres**
   - Status: Verified
   - Summary: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.

3. **S3-compatible object storage**
   - Status: Verified
   - Summary: Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified.

### Workflow Steps
1. **Build and start**  
   `npm install`, `nest build` (TypeScript) then `node dist/main.js` on the node-22 template; the server must bind 0.0.0.0 on PORT.

2. **Create the bucket and pass its credentials**  
   Create it once with `ample bucket create`, then pass endpoint, region, bucket and keys with --env; use path-style addressing.  
   Command: `ample deploy . --name --public --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=...`

3. **Authorize before touching storage**  
   Return 401 for unauthenticated requests and 403 for the wrong role; keep the bucket unpublished and stream objects through the app.

4. **Verify**  
   Fetch the live URL and /p/private-document-library on the example; on failure read the build and runtime logs.  
   Command: `ample logs --kind build`

### Limitations
- Verified on the node-22 template at s-1vcpu-1gb; other sizes and NestJS major versions are not verified.
- Region, compliance attestations and request-duration limits are unknown and not claimed.
- Managed PostgreSQL 16 only; extensions, connection limits and backup or restore procedures are not verified.
- PutObject and GetObject with path-style addressing are verified; other S3 operations are not.

### Cost Estimate
- **Currency**: USD  
- **Monthly Amount**: 10.0  
- **Components**:
  - App server: size `s-1vcpu-1gb`, quantity 1.0, monthly amount 5.0  
  - Managed PostgreSQL database: size `s-1vcpu-1gb`, quantity 1.0, monthly amount 5.0  
- **Note**: Always-on monthly price of the tested sizes; apps auto-pause when idle. Buckets are allocation-priced per quota and not included.

### Evidence Summary
- **Kind**: canary_run  
- **Summary**: NestJS pattern fixture deployed on Ample (npm install, nest build (TypeScript) then node dist/main.js on the node-22 template); for this guide: a role-to-document access model with negative tests (401, 403) and an authorized private-bucket round-trip (private=ok).
- **Observed At**: 2026-09-21T02:34:39Z  
- **Expires At**: 2027-03-20T02:34:39Z  
- **Checks**: /p/private-document-library

### Next Actions
- **Browse the catalog index**
  - Method: GET
  - Relative Path: /v1/catalog

- **Search published recipes by intent, stack and constraints**
  - Method: POST  
  - Relative Path: /v1/catalog/search  
  - Parameters: { "body": { "limit": 5, "query": "Enforce private-file authorization for NestJS" }}

- **Prepare a side-effect-free deployment plan for an authorized project**
  - Method: POST  
  - Relative Path: /v1/catalog/plan  
  - Parameters: { "body": { "inputs": {}, "projectId": "", "recipeId": "page:guides:nestjs:private-file-access", "recipeRevision": "r1" }}

- **Read the existing agent authentication setup**
  - Method: GET  
  - Relative Path: /mcp/setup

- **Browse NestJS**
  - Method: GET
  - Relative Path: /v1/catalog/nodes/stack%3Aframework-nestjs

- **Browse Connect app to storage**
  - Method: GET
  - Relative Path: /v1/catalog/nodes/intent%3Aconnect-app-to-storage

- **Browse Private document library**
  - Method: GET
  - Relative Path: /v1/catalog/nodes/pattern%3Aprivate-document-library