Merge pull request #2039 from RajeshPaul38/sustaining-engineering-11779

Updated readme; Added missing steps and how to fix guidelines;

README.md

@@ -83,6 +83,12 @@ These instructions are tested and verified on macOS Catalina (10.15)
     ```shell
     brew install redis
     ```
+    
+    Run the redis server using command:
+    ```
+    redis-server --daemonize yes
+    ```
+    
 
 #### Development Environment
 
@@ -98,42 +104,52 @@ These instructions are tested and verified on macOS Catalina (10.15)
 
 1. Make sure you have the Supermarket repo cloned to your machine, then change into that directory
 
-  ```
-  $ cd supermarket-repo
-  ```
+    ```
+    $ cd <supermarket-repo>
+    ```
 
 1. Then change into the src
 
-  ```
-  $ cd src/supermarket
-  ```
+    ```
+    $ cd src/supermarket
+    ```
 
-1. Install required gems:
+1. Install Bundler gem
+    ```
+    gem install bundler:2.1.4 --user-install
+    ```
 
-  ```
-  $ bundle
-  ```
+1. Install required gems:
+    ```
+    bundle install
+    ```
+    N.B. you might get the following errors. Listing them with the fixes.
+     - Error installing gem: ***ruby-filemagic***
+       - Fix -> `brew install libmagic`
+     - Error installing gem: ***mimemagic***
+       - Fix-> `brew install shared-mime-info`
 
 1. Create the database, migrate the database and seed the database:
 
-  ```
-  $ bundle exec rake db:setup
-  ```
+    ```
+    $ bundle exec rails db:setup
+    ```
 
 1. Add required Postgres extensions.
 
-  ```
-  $ psql supermarket_development -c 'create extension plpgsql'
-  $ psql supermarket_development -c 'create extension pg_trgm'
-  ```
+    ```
+    $ psql supermarket_development -c 'create extension plpgsql'
+    $ psql supermarket_development -c 'create extension pg_trgm'
+    ```
+    N.B. Ignore if the above 2 commands gives error: extenstion already exists.
 
 1. Start the server:
 
-  ```
-  $ bundle exec foreman start
-  ```
+    ```
+    $ bundle exec foreman start
+    ```
 
-  If you receive errors, make sure that redis and Postgres are running.
+    N.B. ***If you receive errors, make sure that redis and Postgres are running.***
 
 ## Setting up Auth