If you are developing some kind of apps related to these platforms (Ruby,NodeJs,Go,scala,PHP,python,Java) then one of the best place to deploy them is Heroku.

Heroku is a cloud platform that lets companies build,deliver,monitor and scale apps.

Not only companies. If you haven't used heroku, then take a look at heroku website.Don't forget to register.

Installation

Let's install Heroku CLI client for your system.Heroku's cli let's you easily manage and deploy your apps in heroku. If you are a ruby developer and i am sure u know about rubygems.

gem install heroku

For other system specific installation instructions take a look at here.

Heroku Login

After installation, you can use heroku command from command prompt or terminal. Now login to heroku account using the following command:

heroku login

It will ask for your heroku username and password. If you want to know more about heroku's command line, you can always ask for help.

heroku help

Rails 5

If you haven't already setup your rails environment:-

gem install rails

Let's create a new application called ImagePick.

rails new ImagePick --database=postgresql

Move into the project and do git init.

cd ./ImagePick
git init

Let's add some functionality to the rails application :

rails generate controller Pages index about

And edit the app/views/pages/index.html.erb

<h2>Hello World</h2>
<p>
The time is now: <%= Time.now %>
</p>

Edit the config/routes.rb and on line 2 add:

root 'pages#index'

Now, start the rails server and test your application

rails server

Navigate to http://localhost:3000 in a browser. Let's commit the changes and start using heroku.

git add . 
git commit -m "Pages controller add with home and index"

Heroku create and deploy

Make sure you are in the directory that contains your Rails app, then create an app on heroku.

heroku create

If the above command succeds without any errors, you are ready for one last command to deploy your application to production: Now to deploy do the app

git push heroku master

Your application will be live on the internet.Let's migrate your database to heroku's.

heroku run rake db:migrate

Your app will be on the internet. To open your app you can do

heroku open