Added README

README.md

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+# Connect to Firebase
+
+## Web Setup
+
+- On the Firebase console, add a new web application and enter your projects details.
+
+- Got to Firebase Projects settings and select your web app.
+- From the Firebase SDK snippet, select `Config` options.
+- Copy the Firebase config and add it to following location `/src/api/firebase/config/index.js`
+
+```JavaScript
+  const firebaseConfig = {
+    apiKey: "xxx",
+    authDomain: "xxx",
+    databaseURL: "xxx",
+    projectId: "xxx",
+    storageBucket: "xxx",
+    messagingSenderId: "xxx",
+    appId: "xxx",
+    measurementId: "xxx"
+  };
+```
+
+## iOS Setup
+
+- On the Firebase console, add a new iOS application and enter your projects details.
+
+- Download the `GoogleService-Info.plist` file and place it inside of your project at the following location: `/src/api/firebase/config/GoogleService-Info.plist`.
+
+## Android Setup
+
+- On the Firebase console, add a new Android application and enter your projects details.
+
+To generate Debug signing certificate SHA-1 (optional) use the command below or [follow the following instruction](https://developers.google.com/android/guides/client-auth). This step is not required unless you want to distribute your app using Firebase App Distribution.
+
+```shell
+keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android
+```
+
+On the Firebase console, add a new Android application and enter your projects details.
+
+- Download the `google-services.json` file and place it inside of your project at the following location: `/src/api/firebase/config/google-services.json`.
+
+# Run development server
+
+- Install dependencies
+
+```
+yarn install
+```
+
+- Start app in a specific platform, platform could be `web`, `ios` or `android`
+
+```
+yarn <platform> 
+```