Update README.md

README.md

@@ -35,4 +35,65 @@ Before you begin, ensure you have:
 First, update your existing list of packages to ensure you are getting the latest versions.
 
 ```bash
-sudo apt update
+sudo apt update
+```
+2. Install Dependencies
+Install the prerequisite packages that allow apt to use packages over HTTPS.
+```Bash
+sudo apt install apt-transport-https ca-certificates curl software-properties-common
+```
+3. Add Docker Repository
+Add the GPG key for the official Docker repository to your system to ensure downloads are valid.
+```Bash
+curl -fsSL [https://download.docker.com/linux/ubuntu/gpg](https://download.docker.com/linux/ubuntu/gpg) | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
+```
+Add the Docker repository to your APT sources.
+```Bash
+echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] [https://download.docker.com/linux/ubuntu](https://download.docker.com/linux/ubuntu) $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+```
+4. Install Docker Engine
+Update the package database again with the Docker packages from the newly added repo.
+```Bash
+sudo apt update
+```
+Finally, install Docker.
+
+```
+sudo apt install docker-ce
+```
+⚙ Post-Installation Configuration
+Run Docker Without Sudo (Optional)
+By default, the docker command can only be run by the root user or by a user in the docker group. To avoid typing sudo for every command, add your current user to the docker group.
+
+Add your user to the docker group:
+
+```Bash
+sudo usermod -aG docker ${USER}
+```
+Apply the new group membership (requires logging out or running the following):
+```Bash
+su - ${USER}
+```
+Verify that your user is added to the group:
+```Bash
+groups
+```
+Output should look like: sammy sudo docker
+
+✅ Verification
+Check that Docker is running correctly.
+
+```Bash
+sudo systemctl status docker
+```
+To verify that you can pull images from Docker Hub, run the "Hello World" container:
+```bash
+docker run hello-world
+```
+
+If successful, you will see a message indicating that your installation appears to be working correctly.
+
+📚 Resources
+Official Docker Documentation
+
+DigitalOcean Docker Tutorial