chore: better path joining

main.go

@@ -5,7 +5,9 @@ import (
 	"io"
 	"log"
 	"net/http"
+	"net/url"
 	"os"
+	"path"
 
 	"github.com/google/uuid"
 )
@@ -46,15 +48,20 @@ or:    cmd | curl --data-binary @- %s
 				log.Fatalln(err)
 			}
 
-			os.WriteFile("db/"+uuid.String(), body, 0644)
-			fmt.Fprintf(w, hostURL+uuid.String())
+			os.WriteFile(path.Join("db", uuid.String()), body, 0644)
+			url, err := url.JoinPath(hostURL, uuid.String())
+			if err != nil {
+				log.Fatalln(err)
+			}
+			fmt.Fprintf(w, url)
 			log.Printf("paste created: uuid=%s", uuid.String())
 		default:
 			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
 		}
 	})
 
-	http.Handle("/", http.FileServer(http.Dir("db")))
+	http.Handle("/", http.FileServer(http.Dir(databasePath)))
 
+	log.Printf("Starting server on %s", listenAddr)
 	log.Fatal(http.ListenAndServe(listenAddr, nil))
 }