[ADD] Docker image push guide for better readability

Push image to docker hub/README.md

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+# How to Push Docker Images to Docker Hub 🐳
+
+**Follow these steps to push your Docker images to Docker Hub:**
+
+---
+
+### 1. 🛠 Prerequisites
+- **Install Docker**: Ensure Docker is installed and running on your system.
+- **Docker Hub Account**: Create an account on [Docker Hub](https://hub.docker.com/) if you don’t already have one.
+
+---
+
+### 2. 🔑 Log in to Docker Hub
+Open your terminal and run:
+
+ ```bash
+  docker login
+ ```
+- Enter your Docker Hub **username** and **password** correctly when prompted.
+
+### 3. Choose which image you want to push to Docker Hub using the command `docker images`.
+
+### 4. Suppose we take an example where there is an image, and we need to push it to Docker Hub named `helpops`.
+
+### 5.  After successfully logging into Docker Hub, we now need to assign a tag to docker image using the command below.
+
+ ```bash
+  docker tag helpops azfaralam440/helpops:01
+ ```
+
+  - --> Here, "azfaralam440" is my own Docker Hub username, so on your side, you need to use your own Docker Hub username and specify your Docker image name and tag.
+
+### 6. ⬆ Now, the final step is to push your image to Docker Hub.
+
+ ```bash
+  docker push azfaralam440/helpops:01
+ ```
+
+- **Congratulations, you have successfully pushed your image to Docker Hub.**