# mostikov/express-typescript-boilerplate architecture

> Architecture diagram of the GitHub repository mostikov/express-typescript-boilerplate, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-28). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/mostikov/express-typescript-boilerplate
- Repository: https://github.com/mostikov/express-typescript-boilerplate

## Overview

This is a minimal Express/TypeScript server scaffold. Its visible request workflow configures middleware, dispatches `/public-api/health-check` to a controller, and handles unmatched routes and errors. Startup also initializes a service vault containing a Redis service. The health-check implementation, Redis implementation, and entrypoint wiring were not sampled, so their internal behavior and connections are not inferred.

Main entry points: [`src/app.ts`](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/app.ts) (Express app), [`src/services/index.ts`](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/services/index.ts) (Service initializer), [`src/routes/public-api/index.ts`](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/routes/public-api/index.ts) (Public router), [`src/controllers/public/healthCheck.ts`](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/controllers/public/healthCheck.ts) (Health controller)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_http["HTTP server"]
  node_app["Express app<br/>[app.ts]"]
  node_cors["CORS middleware<br/>[app.ts]"]
  node_json["JSON parser<br/>[app.ts]"]
  node_public_router["Public router<br/>[index.ts]"]
  node_health_controller["Health controller<br/>[healthCheck.ts]"]
  node_not_found["Not-found route<br/>[routeNotFound.ts]"]
end

subgraph group_services["Service registry"]
  node_service_init["Service initializer<br/>[index.ts]"]
  node_service_vault["Service vault<br/>[servicesVault.ts]"]
  node_base_service["Service contract<br/>[baseService.ts]"]
  node_redis_service["Redis service<br/>[redis.service.ts]"]
end

subgraph group_shared["Shared infrastructure"]
  node_error_handler["Error handler"]
  node_error_types["Application errors<br/>[errors.types.ts]"]
end

node_client(("HTTP client"))
node_response(("HTTP response"))

node_client -->|"sends request"| node_app
node_app -->|"applies"| node_cors
node_app -->|"parses JSON"| node_json
node_app -->|"mounts"| node_public_router
node_public_router -->|"dispatches"| node_health_controller
node_health_controller -->|"sends health result"| node_response
node_app -->|"falls through"| node_not_found
node_app -->|"handles errors"| node_error_handler
node_error_handler -->|"checks"| node_error_types
node_app -->|"initializes services"| node_service_init
node_service_init -->|"creates"| node_service_vault
node_service_init -->|"registers"| node_redis_service
node_service_vault -->|"stores contract"| node_base_service

click node_app "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/app.ts"
click node_cors "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/app.ts"
click node_json "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/app.ts"
click node_public_router "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/routes/public-api/index.ts"
click node_health_controller "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/controllers/public/healthCheck.ts"
click node_not_found "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/routes/routeNotFound.ts"
click node_error_handler "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/middlewares/errorHandler.middleware.ts"
click node_error_types "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/types/errors.types.ts"
click node_service_init "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/services/index.ts"
click node_service_vault "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/services/servicesVault.ts"
click node_base_service "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/types/baseService.ts"
click node_redis_service "https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/services/redis.service.ts"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_app,node_cors,node_json,node_public_router,node_health_controller,node_not_found,node_client toneBlue
class node_service_init,node_service_vault,node_base_service,node_redis_service toneAmber
class node_error_handler,node_error_types toneMint
class node_response toneIndigo
```

## Components

### HTTP server

- [Express app](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/app.ts): `src/app.ts`
- [CORS middleware](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/app.ts): `src/app.ts`
- [JSON parser](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/app.ts): `src/app.ts`
- [Public router](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/routes/public-api/index.ts): `src/routes/public-api/index.ts`
- [Health controller](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/controllers/public/healthCheck.ts): `src/controllers/public/healthCheck.ts`
- [Not-found route](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/routes/routeNotFound.ts): `src/routes/routeNotFound.ts`

### Service registry

- [Service initializer](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/services/index.ts): `src/services/index.ts`
- [Service vault](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/services/servicesVault.ts): `src/services/servicesVault.ts`
- [Service contract](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/types/baseService.ts): `src/types/baseService.ts`
- [Redis service](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/services/redis.service.ts): `src/services/redis.service.ts`

### Shared infrastructure

- [Error handler](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/middlewares/errorHandler.middleware.ts): `src/middlewares/errorHandler.middleware.ts`
- [Application errors](https://github.com/mostikov/express-typescript-boilerplate/blob/main/src/types/errors.types.ts): `src/types/errors.types.ts`

### Other components

- **HTTP client**
- **HTTP response**

## Connections

- HTTP client → Express app: sends request
- Express app → CORS middleware: applies
- Express app → JSON parser: parses JSON
- Express app → Public router: mounts
- Public router → Health controller: dispatches
- Health controller → HTTP response: sends health result
- Express app → Not-found route: falls through
- Express app → Error handler: handles errors
- Error handler → Application errors: checks
- Express app → Service initializer: initializes services
- Service initializer → Service vault: creates
- Service initializer → Redis service: registers
- Service vault → Service contract: stores contract