update action and added git ignore

Author: snithyanantham

.gitignore

@@ -41,6 +41,9 @@ build/Release
 node_modules/
 jspm_packages/
 
+# Package Lock
+package-lock.json
+
 # TypeScript v1 declaration files
 typings/
 

action.yml

@@ -15,7 +15,7 @@ inputs:
     description: 'docker-compose File Path'
     required: true
   heroku_apps: 
-    description: 'List of Docker Image name and Heroku app names with it's type'
+    description: 'List of Docker Image name and Heroku app names with type'
     required: true
 branding:
   icon: package