Update docker file, readme and setup script

README.md

@@ -4,6 +4,8 @@ The purpose of this project is to build a web application that enables subscribi
 
 ## Setup
 
+* Before setup please confirm that Docker is installed `docker --version`. If not install it from official site. 
+
 ### Setup with npm commands
 
 1. Install packages  
@@ -24,7 +26,7 @@ this will create and run postgres image and then execute migrations
 `docker build -t marketalerts .`
 
 2. Run postgres image with  
-`docker run --name pg_marketalerts -d -p 5432:5432 marketalerts`
+`docker run -e POSTGRES_USER=docker -e POSTGRES_PASSWORD=docker -e POSTGRES_DB=marketalerts --name pg_marketalerts -d -p 5432:5432 marketalerts`
 
 3. Install packages  
 `npm install`
@@ -41,3 +43,4 @@ this will create and run postgres image and then execute migrations
     - AWS SES credentials are handled with env vratiables
     - Notification emails are sent in batches of 50, by using SES templates
     - Make sure that you are using different templates for different envirorments
+