Configuration

The Tech Strategy Tool is configured via standard ASP.NET Core configuration — appsettings.json files and environment variables. This page documents the available settings and their defaults.

Connection String

The only configuration the application reads from settings is the PostgreSQL connection string:

ConnectionStrings:DefaultConnection

This is used by the TechStratDbContext registered in Program.cs with UseNpgsql().

appsettings.json (base)

The base configuration file is minimal — it contains only logging defaults and no connection string:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*"
}

appsettings.Development.json

The development configuration adds the connection string matching the Docker Compose PostgreSQL credentials:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "ConnectionStrings": {
    "DefaultConnection": "Host=localhost;Port=5432;Database=techstrat;Username=techstrat;Password=techstrat_dev"
  }
}

Override via environment variable

ASP.NET Core’s configuration system supports __ (double underscore) as a section separator in environment variables:

ConnectionStrings__DefaultConnection="Host=mydb;Port=5432;Database=techstrat;Username=app;Password=secret"

There is no explicit environment variable handling in the codebase — no GetEnvironmentVariable() calls, no .env file loading, no custom config providers. All environment variable support comes from ASP.NET Core’s built-in configuration system.

Hardcoded Defaults

All operational settings beyond the connection string are hardcoded as constructor defaults or constants. There are no configuration sections for these values.

Setting	Value	Location
Checkpoint threshold	100 applied events	EventProcessor constructor default
Session expiry	7 days	AuthEndpoints.cs (TimeSpan.FromDays(7))
Login rate limit	5 attempts	LoginRateLimiter constructor default
Login lockout duration	15 minutes	LoginRateLimiter constructor default
Session cache TTL	5 minutes	SessionCache constant (TimeSpan.FromMinutes(5))
SSE heartbeat interval	15 seconds	SseHeartbeatService

Environment-Specific Behavior

Development mode

When ASPNETCORE_ENVIRONMENT=Development:

• Auto-migration: EF Core migrations are applied automatically on startup via db.Database.MigrateAsync()
• User seeding: Three default users are created if the users table is empty:
  • admin / admin (role: admin)
  • editor / editor (role: editor)
  • viewer / viewer (role: viewer)
• Developer certificate: HTTPS uses the .NET developer certificate (dotnet dev-certs)

Both auto-migration and user seeding are gated behind app.Environment.IsDevelopment() in Program.cs. They do not run in any other environment.

Development only

Auto-migration and user seeding only run in Development mode. Other environments must apply migrations explicitly and create users through the Admin API.

Other environments

When ASPNETCORE_ENVIRONMENT is anything other than Development:

• No auto-migration — apply migrations manually or via a deployment pipeline
• No user seeding — create the initial admin user via direct database access or a setup script
• HTTPS requires a proper certificate (see below)

HTTPS Configuration

Development

In development, the .NET developer certificate is used automatically. Ensure it is trusted:

dotnet dev-certs https --trust

The application URL is configured in launchSettings.json:

https://localhost:5001;http://localhost:5000

HTTPS is required for authentication

The session cookie is configured with Secure = true and SameSite = Strict. This means the browser will not send the cookie over plain HTTP. Authentication only works over HTTPS.

Production

For production, you would need to either:

• Use a reverse proxy (nginx, Caddy, etc.) to terminate TLS in front of the application
• Configure Kestrel with a real certificate via appsettings.json or environment variables

Ports

Port	Service	Configurable
5001	ASP.NET Core (HTTPS)	Via launchSettings.json or Kestrel config
5000	ASP.NET Core (HTTP)	Via launchSettings.json or Kestrel config
5432	PostgreSQL	Via docker-compose.yml port mapping

SSE runs over the same HTTP/HTTPS connection — no additional ports are required.

Changing the API port

Modify Properties/launchSettings.json in the API project, or set the ASPNETCORE_URLS environment variable:

ASPNETCORE_URLS=https://localhost:6001 dotnet watch --project src/TechStrat.Api

Logging

The application uses ASP.NET Core’s built-in ILogger with structured logging. Key log points:

Component	What is logged
EventEndpoints	Event applied/rejected, checkpoints, restores
SseConnectionManager	Connection open/close
AuthEndpoints	Login success/failure/lockout
ProcessorInitializer	Cold start progress (checkpoint load, replay count)

Configure log levels in appsettings.json:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  }
}

Health Check

GET /health returns a basic health response:

{
  "status": "healthy"
}

This endpoint does not check database connectivity — it only confirms the application is running and accepting requests.

Summary of Configuration Sources

Setting	Source	Override
Connection string	appsettings.Development.json	Environment variable
API port	launchSettings.json	ASPNETCORE_URLS env var
Log levels	appsettings.json	Environment-specific config
PostgreSQL port	docker-compose.yml	Edit file directly
Auto-migration	Gated on IsDevelopment()	Set ASPNETCORE_ENVIRONMENT
User seeding	Gated on IsDevelopment()	Set ASPNETCORE_ENVIRONMENT
All other settings	Hardcoded (see table above)	Requires code change