feat: load explicit configuration references and remove implicit env overlays

examples/modules/main.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"flag"
 	"log"
 	"os"
 	"os/signal"
@@ -106,13 +107,11 @@ func newApp(settings omni.Config, token, upstream string) (application *omni.App
 }
 
 func run(ctx context.Context) error {
-	settings, err := omni.LoadConfig("")
+	settings, err := omni.LoadConfig(*configPath)
 	if err != nil {
 		return err
 	}
-	if os.Getenv("GO_OMNI_HTTP_ADDR") == "" {
-		settings.Address = "127.0.0.1:8080"
-	}
+
 	token := os.Getenv("GO_OMNI_DEV_TOKEN")
 	if token == "" {
 		token = "dev-token"
@@ -124,7 +123,10 @@ func run(ctx context.Context) error {
 	return application.RunContext(ctx)
 }
 
+var configPath = flag.String("config", "examples/modules/config.yaml", "configuration file")
+
 func main() {
+	flag.Parse()
 	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
 	defer stop()
 	if err := run(ctx); err != nil {