feat: set data dir for headscale

server/internal/config/sys-conf.ts

@@ -1,6 +1,9 @@
+import path from "path";
+
 class SystemConfig {
   private libraryFolder = process.env.LIBRARY ?? "./.data/library";
   private dataFolder = process.env.DATA ?? "./.data/data";
+  private headscaleFolder = path.join(this.dataFolder, "headscale");
 
   getLibraryFolder() {
     return this.libraryFolder;
@@ -9,6 +12,10 @@ class SystemConfig {
   getDataFolder() {
     return this.dataFolder;
   }
+
+  getHeadscaleFolder() {
+    return this.headscaleFolder;
+  }
 }
 
 export const systemConfig = new SystemConfig();