DEV Community: Egbe Fredrick

DOCKERIZING A NOTE WEB APP THAT SAVES ITS DATA IN A PostgreSQL Database AND DEPLOYING IT ON AZURE IN THREE (3) DIFFERENT WAYS.

Egbe Fredrick — Mon, 05 Oct 2026 17:18:40 +0000

This blog shows three (3) different ways to host an app on Azure safely and efficiently. The three ways are as follows:

Azure Container Instances.
Web App for Containers + Azure Database for PostgreSQL.
Virtual Machine + Docker Compose.

REQUIREMENTS:
• Microsoft Azure Account.
• Dockerhub Account.
• Dockerhub desktop App installed on your local computer.

No.1: Azure Container Instances.
First thing to do is to write your docker-compose.yaml and make sure that script is in order then follow these steps:
(a). Build the Docker Image Locally on your PC.

This makes Docker to download the base images, builds your image, then reports that the network, the volume and two containers were created or started.

docker compose ps & docker compose logs app : Docker Compose ps helps you to list the running containers while Docker compose Logs are the first place to look whenever something behaves strangely. Then open http://localhost:3000 in your browser.

This is proof that the full chain works and that the browser talks to the app and the app talks to the database.

Publish Your Image to Docker Hub: At this moment, your app image exists only on your computer. Azure can't access your laptop, so you need to upload the image to a registry Azure can pull from.

Now log into your Azure Account in your terminal using Azure CLI command and create a resource group.

I created some variable to be use continuesly.

Also I create an aci-notes.yaml file that tells Azure which containers to run and how to configure them. Azure reads this file the way Docker Compose reads docker-compose.yaml.

Then create this:

and do this to fetch IP address:

Checking to see if the container is okay.

open in browser:

No. 2: Web App for Containers and a Managed Database: Azure handles backups, patching, high availability and scaling for you. The app itself runs on Azure Web App for Containers, a platform built for hosting containerized web apps, with automatic HTTPS, scaling and deployment slots. This is the recommended pattern.

Create the managed PostgreSQL server.

Checking the server to capture its address.

Creating the App Service plan.

Creating the web app from your image.

Point the app at the managed database.

Restart the app and wait.

No.3: Virtual Machine + Docker Compose: Sometimes you want full control over the server, custom software, specific networking, or simply to understand what platforms like Web App for Containers do behind the scenes. In this option you rent a Linux server, install Docker on it yourself, and run the same kind of compose file you used locally. You are now the system administrator.

Create a resource group and a small Ubuntu Linux server inside it.

Opening port 3000.

Connecting to the VM.

Refreshing the package list.

Install Docker and Docker Compose on the VM.

Install helper tools.

Create a folder for repository keys.
Download Docker's signing key.
Make the key readable.
Add Docker's official repository.
Refresh the package list again.
Installing Docker.
Let user run Docker without sudo and apply the group change.
Create the compose file on the VM.
Test the App from your own computer.

Note: if you are running a demo, then don’t forget to always clean-up after your practices in order not to incur charges on Azure. To achieve this always delete the resource group by running the command below on your terminal.
az group delete --name notes-vm-rg --yes --no-wait
Replace the name with your own resource group name.
Thank you for reading this.

DOCKERIZING AN APP INTO A DOCKER IMAGE AND DEPLOYING IT USING DOCKERHUB AND AZURE CONTAINER INSTANCE.

Egbe Fredrick — Tue, 29 Sep 2026 16:54:16 +0000

First Step: CLONING A GITHUB REPOSITORY FOR THE APP CODE
Clone the app code you want to containerize into a Docker Image from GitHub; the image below shows exactly how I did it.

Cloning successful; now cd into the folder:

Second Step: BUILDING DOCKER IMAGE.
Now that you have the folder on your local computer, it's time to build it using the "docker build" COMMAND.
This command runs with the help of the script command in your Dockerfile, which tells docker the exact way to and what to use in building the image. Below are practical steps in screenshot form.

Third Step: CONTAINERIZING THE IMAGE.
Image build was successful. Now check the status of your image using the command "docker images" before you containerize it using the command "docker run".

Fourth Step: ACCESSING THE APP LOCALLY THROUGH PORT 3000 ON YOUR WEB BROWSER.
Now you run it in your browser at localhost:3000 and see if it is working fine.

Fifth Step: PUSHING AND PUBLISHING THE IMAGE ON DOCKERHUB
After confirming that the image runs perfectly and there is nothing wrong with the code, I pushed it to my Docker Hub account using the Command "docker push".

To show proof of a successful push log into your docker hub account to confirm.

Sixth Step: CREATING AND DEPLOYING AZURE CONTAINER INSTANCE.
Now that we have it on dockerhub, I went ahead to create an Azure Container Instance (ACI) so that i can deploy the docker image on Azure ACI. The steps are as follow:
(a). Create an Azure Resource Group.

(b). Create an Azure Container Instance (ACI).

(c). Requesting the Container Instance IP.

(d). Using the IP address to check if it's running. Whatever the address is add ":3000" to it at the end for the app to display.

CONCLUSION:
The -p 3000 in the command run means that Docker should expose port 3000 for an HTTP connection, which in turn allows a public web address that allows traffic.
Thank you for reading this.
cheers...

Creating a VNet and Subnet on Microsoft Azure

Egbe Fredrick — Tue, 09 Jun 2026 15:07:57 +0000

First Step:

Log in to your Azure Account, and in the search bar, search for Resource Groups and click on it.

Click on Create

Then fill in the necessary fields.

Second Step:

Go to your Azure Home Page, and in the search bar, search for Virtual Network and click the icon.

Then click on Create.

Fill the necessary fields and click Next.

Virtual Network created successfully.

The Third and Final Step:

Click the Virtual Network you just created, then use the search bar on the left to search for "subnet" and click the icon.

Then click on "+subnet".

Fill the neccessary field and click Add.

Subnet successfully added.

and that's the end.

A Step-by-Step Process of Hosting a Static Website on Microsoft Azure.

Egbe Fredrick — Mon, 08 Jun 2026 14:41:58 +0000

STEP ONE(1):

Go to your Azure Account Search bar and search for Resource Group.

Click on the resource group icon, then click on Create.

Fill in the fields provided, then click on Next.

Click on Review and Create.

Then click on Create.

Resource Group created successfully.

so here is the resource group.

STEP TWO (2):

Go to your home page on Azure, search for Storage Accounts, and click the icon.

Then click on Create.

Fill in the provided fields.

then click on Next

Fill in the neccessary fields

Storage was successfully created.

The Storage Account Info.

On the left-hand side of the screen, use the search bar, search for static web, then Click On it to enable.

Enable it.

STEP Three (3):

Create a container that will hold everything relating to the static website you are hosting.

Click Add container and create.

Now click on the container you created.

Now Upload your Static Website Files.

Upload successful.

Website is Now Live.

Thank you for reading this. Please leave your comments.

Creating a user and granting that user Global Administrator Access and revoking it on Microsoft Azure.

Egbe Fredrick — Tue, 26 May 2026 14:58:58 +0000

FIRST STEP(1): Using Azure Entra ID to create a new User:

*After selecting on the Microsoft Entra ID go ahead and select Manage. *

Then go ahead and click on User on the left-hand side of the box.

Click on New User, then Create New User.

Fill in all the asterisk fields.

also

Lucy as a User in the list.

The newly created User, Lucy's page:

STEP TWO(2): Granting the User Lucy the Global Administrator Access.
Again, go to Microsoft Entra ID.

Then click on Roles and Administrators on the left-hand side.

Go ahead to the Search Bar:

Search for Global Administrators then click on it.

Select Add Assignments.

Then Select and Add your user.

User Role Assignment Added Successfully

STEP THREE(3): Using the newly promoted account, to create another new user in Azure Entra ID.

Then

Lucy, the New User, successfully created a user after Global Administrator Access was granted.

STEP FOUR(4): After creating the second user, revoke the Global Administrator access from the first user account.

Once more, head to Entra ID.

Then Select Roles and Administrators.

Then, search for Global Administrators and select it.

Pick the user you want to deactivate from the role.

Then select Remove assignments.

User's Assignment Revoked successfully.

And Lucy is unable to create a new user.

Thank you for reading this.

Hi everyone 👋 I’m new to Dev.to and excited to join the community. I’m interested in tech, creativity, and learning more about software development and digital skills. Looking forward to connecting, learning from you all, and sharing my journey here 🚀

Egbe Fredrick — Mon, 25 May 2026 13:41:33 +0000