Merge pull request 'Add README.md' (#3) from agent into main

Reviewed-on: #3

README.md

@@ -0,0 +1,60 @@
+# simpleidp
+
+Self-hosted OAuth 2.0 / OpenID Connect identity provider built with ASP.NET Core 8.0 and SimpleIdServer.
+
+## Features
+
+- OAuth 2.0 Authorization Code flow with PKCE support
+- OpenID Connect authentication
+- Multiple authentication methods (password, SMS, OTP, WebAuthn, mobile, email, console, verifiable presentations)
+- Multi-realm support
+- User management with roles and claims
+- Client management with configurable redirect URIs
+- Refresh tokens with configurable expiration
+- Consent management
+
+## Technology Stack
+
+- **Framework**: .NET 8.0
+- **Identity Server**: SimpleIdServer 6.0.*-*
+- **UI**: Razor Pages
+- **Container**: Docker (multi-stage build)
+
+## Quick Start
+
+### Run Locally
+
+```bash
+dotnet run
+```
+
+The server starts on:
+- HTTPS: `https://localhost:65455`
+- HTTP: `http://localhost:65456`
+
+### Run in Docker
+
+```bash
+docker build -t simpleidp .
+docker run -p 8080:8080 simpleidp
+```
+
+## Configuration
+
+Configuration is loaded from JSON files in the `config/` directory:
+
+- `users.json` - User definitions (username, password, email, roles, claims, consents)
+- `clients.json` - OAuth 2.0 client definitions
+- `realm.json` - Realm configuration
+- `scopes.json` - Available scopes and claim mappers
+- `api.json` - API resource definitions
+
+## Default Credentials
+
+- **Username**: `administrator`
+- **Password**: `password`
+- **Email**: `adm@mail.com`
+
+## Docker Hub
+
+Image: `mareklesko/simpleidp`