Issue #SB-000 chore: add new steps to readme

README.md

+# Sunbird Program Service
+
+### Prerequisites: Postgres, Node v12+
+
+## Run Locally
+
+Clone the project
+```bash
+    https://github.com/Sunbird-Ed/program-service.git
+```
+
+Go to the project directory
+```bash
+    cd program-service
+```
+Install Git Submodules to make use of
+https://github.com/project-sunbird/sunbird-js-utils.git
+```bash
+    git submodule init
+    git submodule update
+```
+
+Install dependencies
+```bash
+    cd src/
+    npm install
+```
+
+Set the env variable in  `<project-folder>/src/envVariables.js`
+```bash
+    baseURL: process.env.dock_base_url || 'http://dock.sunbirded.org',
+    SUNBIRD_URL: process.env.sunbird_base_url || 'https://dev.sunbirded.org',
+    SUNBIRD_PORTAL_API_AUTH_TOKEN: process.env.sunbird_api_auth_token
+```
+
+Start the server
+```bash
+    node app.js
+```
+the node app will run on `http://localhost:6000`
+
+> Note: To create Postgres table in the local db use the `<project-folder>/programs.sql`