Log the config of the project

src/server/editorServices.ts

@@ -1757,6 +1757,12 @@ namespace ts.server {
                 configFileErrors.push(...parsedCommandLine.errors);
             }
 
+            this.logger.info(`Config: ${configFilename} : ${JSON.stringify({
+                rootNames: parsedCommandLine.fileNames,
+                options: parsedCommandLine.options,
+                projectReferences: parsedCommandLine.projectReferences
+            }, /*replacer*/ undefined, " ")}`);
+
             Debug.assert(!!parsedCommandLine.fileNames);
             const compilerOptions = parsedCommandLine.options;