feat(api): bootstrap Go HTTP server

backend/cmd/api/main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+)
+
+func main() {
+	http.HandleFunc("/health", healthHandler)
+
+	log.Println("server listening on http://localhost:8080")
+
+	if err := http.ListenAndServe(":8080", nil); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func healthHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+
+	response := map[string]string{
+		"status": "ok",
+	}
+
+	if err := json.NewEncoder(w).Encode(response); err != nil {
+		log.Println("failed to encode health response:", err)
+	}
+}