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Let's discuss about CircleCi and Continuous Delivery/Continuous Deployment.
Check out my CICI with Jenkins, which is another CircleCi alternative. _

🎯 Prerequisite

NodeJs and Express Knowledge
Heroku Account
CircleCi Account

To deploy Heroku, let's create up a very simple app.

Let create our server

Let's edit our package.json and .env files

Now we start our server

In this section 2 we will deploy to Heroku using the Heroku cli

Log in to Heroku

Create Heroku app

Let push our codes to Github at this stage

git init && git add . && git commit -m "Initial commit" && git branch -M main && git remote add origin https://github.com/drsimplegraffiti/cicd-heroku-circleci.git && git push -u origin main

Next we connect heroku to our apploid app

Let's add Port to Heroku Environment variable

We can deploy to Heroku

Open app on a browser

Result:

In this section, let's setup our circle with github. Head up to circleci and login with Github

Let's setup and connect our app in CircleCI

Click on the setup project button

Choose a deployment method

Choose deploy with Heroku

Set your env config on circle ci

Click and run

Let me copy the config file and do some editing on the yml file

Setup the config.yml file

Now click on commit and run. Lets see if our build was successful

Let's add another router called deploy

Notice we didnt run git push heroku main. Let's if our deploy endpoint is active. Open your browser and type:
https://apploid.herokuapp.com/deploy

Debugging failed build

I made this build fail on purpose in order to show you how to debug minor issues. Click on the failed button for details

This happened before i didnt add my Heroku api keys and heroku app name in the CircleCi Environment variable.Lets do that right now. Go to account settings on Heroku and copy the key and paste in the env varible on CircleCi

Go to CircleCi, under project settings and add the env

Lets repush to github

Now open your browser to the our deployed url refelct on heroku

Conclusion

I hope this was helpful. Comment in the section below