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ERP-core/README.md
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# ERP System — Inventory & Supply Chain (Phase 1)
A modular ERP built in phases. **Phase 1** delivers Inventory & Supply Chain: master data, procurement, goods receipt, and stock management with **FIFO** costing, **multi-warehouse**, single-tenant.
Monorepo: a .NET 10 REST API backend and a Next.js frontend, with all documentation under `docs/`.
## Repository layout
```
erp-monorepo/
├── Backend/ # ASP.NET Core Web API (.NET 10, PostgreSQL) + PROGRESS.md
├── Frontend/ # Next.js (App Router, TypeScript) + PROGRESS.md
└── docs/ # all documentation — START AT docs/00-CORE.md
```
## Start here
**All work begins at [`docs/00-CORE.md`](docs/00-CORE.md)** — the hub. It defines structure, tech stack, backend setup, and routes you to the right doc.
| Doc | Purpose |
|---|---|
| `docs/00-CORE.md` | Hub: structure, stack, backend init, routing |
| `docs/01-DOC-GUIDE.md` | Doc map, reading order, tracking conventions |
| `docs/10-BACKEND-PHASE1.md` | Backend spec: SRS + ER model + architecture |
| `docs/11-BACKEND-PHASE1.md` | Backend API reference (complete req/res) |
| `docs/20-FRONTEND.md` | Frontend user-flows + rules + validation posture |
| `docs/40-DEPLOYMENT.md` | CI/CD pipelines, test/release environments, server runbook |
| `Backend/PROGRESS.md`, `Frontend/PROGRESS.md` | Change checklists (git-shared) |
## Prerequisites
- .NET 10 SDK (`dotnet --version` → `10.0.x`)
- PostgreSQL running on localhost
- `dotnet-ef` tool (`dotnet tool install --global dotnet-ef`)
- Node.js (for the frontend)
## Run the backend
```bash
# create the database in your local Postgres first, e.g.:
# createdb -U postgres ERPCore (or: CREATE DATABASE "ERPCore"; in psql)
cd Backend/ERPCore
# local settings are git-ignored: copy the template, then fill in your Postgres login and the GL key
cp appsettings.Development.json.example appsettings.Development.json
dotnet ef database update
dotnet run
```
- Swagger UI: `https://localhost:<port>/swagger`
- Health: `https://localhost:<port>/health` → `Healthy`
Full setup (packages, folder scaffold, Program.cs wiring) is in `docs/00-CORE.md §5`.
## Run the frontend
```bash
cd Frontend/erp-system
cp .env.local.example .env.local # BACKEND_ORIGIN=http://localhost:5224 (the Next proxy target)
npm install
npm run dev
```
## Configuration & secrets
- `appsettings.json` is committed and holds **no secrets**; environment-specific values are blank there.
- Local: `appsettings.Development.json` (git-ignored, from the `.example`). Deployed (production): set in the `env:` block of `.gitea/workflows/ci-cd.yml`; the deploy generates `appsettings.Production.json` from it on each run, with the DB password and GL API key coming from Gitea secrets — outside Development the API refuses to start when a required key is missing.
- Details and the full key list: `docs/40-DEPLOYMENT.md §5`. Credentials committed in the past must be rotated (`docs/02-SECURITY.md` AR-06).
## Deployment
One workflow, `.gitea/workflows/ci-cd.yml`, does both jobs. Pull requests get checks (only the changed side is checked), and merging a PR into `production` deploys **production** (`erp.hexdive.com`) Fitness-style: publish on the server → stop → copy → start → verify, and only for the backend/frontend whose folder changed. A test environment is designed but on hold (`deploy/on-hold/`). See `docs/40-DEPLOYMENT.md`.
## Tech stack
**Backend:** .NET 10, ASP.NET Core Web API, EF Core 10, PostgreSQL (Npgsql), JWT bearer auth, Serilog, Swashbuckle/Swagger, HealthChecks. Layering: Controller → Service → Repository → UnitOfWork, DTOs at the controller boundary, FIFO in a domain service.
**Frontend:** Next.js (App Router) + TypeScript, plain React hooks, dependency-free validation (client for UX; **server is authoritative**).
## Conventions
- Documentation: one source of truth per topic; edit in place; navigate from `docs/00-CORE.md`.
- Progress: update the relevant `PROGRESS.md` in the same commit as the code (`docs/01-DOC-GUIDE.md §6`).
## Roadmap (future phases)
Sales & CRM · Manufacturing & Production · QC/QA · Accounting · HRM. Phase 1 reserves the integration seams (GL-ready journal entries, reservation status, goods-issue movement, inspection hold, user identity) so later phases integrate without a schema migration.