add possibility to preserve __dirname

Author: BenedyktT

src/config.js

@@ -25,6 +25,7 @@ module.exports = {
     externals: ["knex", "sharp"],
     // Set default file extensions to use the raw-loader with
     rawFileExtensions: ["pem", "txt"],
-    sourceType: "module" // "script" | "module" | "unambiguous"
+    sourceType: "module", // "script" | "module" | "unambiguous"
+    nodeDirname: false
   }
 };

src/webpack.config.js

@@ -35,6 +35,7 @@ const forceExclude = config.options.forceExclude;
 const ignorePackages = config.options.ignorePackages;
 const rawFileExtensions = config.options.rawFileExtensions;
 const sourceType = config.options.sourceType;
+const nodeDirname = config.options.nodeDirname;
 const fixPackages = convertListToObject(config.options.fixPackages);
 const tsConfigPath = path.resolve(servicePath, config.options.tsConfig);
 
@@ -371,6 +372,6 @@ module.exports = ignoreWarmupPlugin({
       { minimize: false },
   plugins: plugins(),
   node: {
-    __dirname: false
+    __dirname: nodeDirname
   }
 });