diff --git a/README.md b/README.md
index a1ad420..b61ed72 100644
--- a/README.md
+++ b/README.md
@@ -22,14 +22,28 @@ npm install @saidsef/tracing-node --save
 
 ## Usage
 
+You can set required params via env variables or function:
+
+Env vars:
+```
+CONTAINER_NAME
+NODE_ENV
+HOSTNAME
+SERVICE_NAME
+NAME_SPACE
+SERVICE_VERSION
+ENDPOINT
+```
+
+Function args
 ```
 const { setupTracing } = require('@saidsef/tracing-node');
-setupTracing('hostname', 'application_name', 'endpoint');
+setupTracing({hostname: 'hostname', serviceName: 'service_name', endpoint: 'endpoint'});
 ```
 
 ```
 import { setupTracing } from '@saidsef/tracing-node';
-setupTracing('hostname', 'application_name', 'endpoint');
+setupTracing({hostname: 'hostname', serviceName: 'service_name', endpoint: 'endpoint'});
 ```
 
 ### Required Parameters are
@@ -37,7 +51,7 @@ setupTracing('hostname', 'application_name', 'endpoint');
 | Name | Type | Description|
 |----- | ---- | ------------- |
 | hostname | string | container / pod hostname | 
-| application_name | string | service / application name |
+| service_name | string | service / application name |
 | endpoint | string | tracing endpoint i.e. `<schema>://<host>:<port>` |
 
 ## Source
diff --git a/libs/index.mjs b/libs/index.mjs
index 5d2b225..ec1b80b 100644
--- a/libs/index.mjs
+++ b/libs/index.mjs
@@ -66,7 +66,7 @@ export function setupTracing (options={}) {
 
   const provider = new NodeTracerProvider({
     resource: new Resource({
-      [SemanticResourceAttributes.CONTAINER_NAME]: containerName,
+      [SemanticResourceAttributes.CONTAINER_NAME]: containerName || serviceName,
       [SemanticResourceAttributes.DEPLOYMENT_ENVIRONMENT]: deploymentEnvironment,
       [SemanticResourceAttributes.HOSTNAME]: hostname,
       [SemanticResourceAttributes.SERVICE_NAME]: serviceName,
diff --git a/package.json b/package.json
index 04f0ca3..6a91cd5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@saidsef/tracing-node",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "description": "tracing NodeJS - This is a wrapper for OpenTelemetry instrumentation packages",
   "main": "libs/index.mjs",
   "scripts": {