Add companion application

cmd/companion/main.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"flag"
+	"log"
+)
+
+const version = "0.1.0"
+
+func main() {
+	flag.Parse()
+
+	cfg, cfgPath, err := loadOrInitConfig()
+	if err != nil {
+		log.Fatalf("config: %v", err)
+	}
+	log.Printf("datascape-companion %s", version)
+	log.Printf("config file: %s", cfgPath)
+
+	srv := newServer(cfg, cfgPath)
+	log.Printf("listening on http://127.0.0.1:%d", cfg.Port)
+	log.Printf("settings page: http://127.0.0.1:%d/config", cfg.Port)
+	if err := srv.run(); err != nil {
+		log.Fatal(err)
+	}
+}