diff --git a/.gitignore b/.gitignore
index b1c2003..cf4e433 100644
--- a/.gitignore
+++ b/.gitignore
@@ -52,7 +52,7 @@
 **/.android/gradlew.bat
 **/.android/local.properties
 **/.android/**/GeneratedPluginRegistrant.java
-/.android/app/google-services.json
+**/.android/app/google-services.json
 
 # iOS/XCode related
 **/.ios/**/*.mode1v3
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..29551eb
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,65 @@
+# How to Collaborate:
+
+1. Fork the repository to your own GitHub account.
+
+2. Open new project in Android Studio using SCM -> git.
+
+3. Enter URL : 
+```
+"https://www.github.com/{username}/Open-Mobile"
+```
+where username is your GitHub account username.
+
+4. Create a branch where you can do your work.
+Don't work on **master** branch.
+```
+$ git branch branchname
+$ git checkout branchname
+```
+
+
+### Configure [For Android]
+- .android/keystore.properties
+- Firebase - google-services.json
+
+**keystore.properties**
+
+Setup a keystore.properties at the root folder with following sample detail and your configurations
+```
+
+# APK sign Keystore details:
+key_store_cetificate = yourCertificate.jks
+key_store_password = yourStorePassword
+key_alias = yourAlias
+key_password = yourPassword
+
+#uncomment release porfile in build.gradle (app-level)
+
+```
+
+**Firebase and google-services.json**
+
+Setup Firebase for the different environment.
+Download the google-services.json and put it in the corresponding folder.
+
+Production: .android/app/src/google-services.json
+
+
+
+5. Stage your work (all files including drawables & don't forget to ignore your keys !)
+```
+$ git add .
+```
+
+6. Commit your changes with a commit message and author details.
+```
+$ git commit -m "Name| files| Changes"
+```
+OR
+```
+CTRL + K from Android Studio
+```
+
+7. Push changes on forked Repository.
+
+8. Generate a Pull Request.