diff --git a/.env b/.envExample
similarity index 100%
rename from .env
rename to .envExample
diff --git a/.idea/crystelf-core.iml b/.idea/crystelf-core.iml
index 24643cc..cca0cd4 100644
--- a/.idea/crystelf-core.iml
+++ b/.idea/crystelf-core.iml
@@ -5,6 +5,8 @@
       <excludeFolder url="file://$MODULE_DIR$/.tmp" />
       <excludeFolder url="file://$MODULE_DIR$/temp" />
       <excludeFolder url="file://$MODULE_DIR$/tmp" />
+      <excludeFolder url="file://$MODULE_DIR$/logs" />
+      <excludeFolder url="file://$MODULE_DIR$/private" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
diff --git a/src/utils/core/config.ts b/src/utils/core/config.ts
index 2bd7bee..25c5e81 100644
--- a/src/utils/core/config.ts
+++ b/src/utils/core/config.ts
@@ -3,7 +3,7 @@ import logger from './logger';
 
 class ConfigManger {
   private static instance: ConfigManger;
-  private env: NodeJS.ProcessEnv;
+  private readonly env: NodeJS.ProcessEnv;
 
   private constructor() {
     dotenv.config();