Phase 9: containerise & deploy to Portainer

cmd/server/main.go

@@ -26,6 +26,11 @@ import (
 )
 
 func main() {
+	if len(os.Args) > 1 && os.Args[1] == "healthcheck" {
+		runHealthcheck()
+		return
+	}
+
 	cfg := config.Load()
 
 	logger := slog.New(slog.NewJSONHandler(os.Stdout, nil))
@@ -127,6 +132,17 @@ func main() {
 	slog.Info("server stopped")
 }
 
+func runHealthcheck() {
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "8080"
+	}
+	resp, err := http.Get("http://localhost:" + port + "/healthz")
+	if err != nil || resp.StatusCode != http.StatusOK {
+		os.Exit(1)
+	}
+}
+
 func ensureIcons(dir string) {
 	for _, size := range []int{192, 512} {
 		path := filepath.Join(dir, fmt.Sprintf("icon-%d.png", size))