Windows server support

server/config_windows.go

@@ -0,0 +1,17 @@
+//go:build windows
+
+package server
+
+import (
+	"os"
+	"path/filepath"
+)
+
+func init() {
+	programData := os.Getenv("ProgramData")
+	if programData == "" {
+		programData = `C:\ProgramData`
+	}
+	DefaultConfigFile = filepath.Join(programData, "ntfy", "server.yml")
+	DefaultTemplateDir = filepath.Join(programData, "ntfy", "templates")
+}