Update README.md

Author: LAhmos

README.md

@@ -1,19 +1,43 @@
 # Dockerfile for Accel-Sim
 
-This repo hosts the Dockerfiles used in regression tests for Accel-Sim and GPGPU-Sim. 
-The image can be pull from Github Container Registry [accelsim cantainers](https://github.com/accel-sim/Dockerfile/pkgs/container/accel-sim-framework)
-```
+This repository hosts the Dockerfiles used in regression tests for **Accel-Sim** and **GPGPU-Sim**.  
+Prebuilt images are available on the GitHub Container Registry: [accel-sim containers](https://github.com/accel-sim/Dockerfile/pkgs/container/accel-sim-framework)
+
+## Requirements
+To enable GPU access inside Docker containers, you need to install the **NVIDIA Container Toolkit**.  
+Follow the installation guide here: [NVIDIA Container Toolkit Install Guide](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/latest/install-guide.html)
+
+---
+
+## Pull the image
+```bash
 docker pull ghcr.io/accel-sim/accel-sim-framework:ubuntu-24.04-cuda-12.8
 ```
 
-To run tests:
-```
-# in accel-sim-framework
-docker run accelsim/development:cuda-12.8.0-ubuntu24.04 /bin/bash short-tests.sh
+## Run regression tests
+From inside `accel-sim-framework`:
+```bash
+docker run ghcr.io/accel-sim/accel-sim-framework:ubuntu-24.04-cuda-12.8 /bin/bash short-tests.sh
 ```
-To start conianer for devlopment:
 
+## Start a container for development
+```bash
+docker run --name <container_name> --runtime=nvidia --gpus all -it \
+  ghcr.io/accel-sim/accel-sim-framework:ubuntu-24.04-cuda-12.8 /bin/bash
 ```
-# in accel-sim-framework
-docker run --name <container name >  --runtime=nvidia  --gpus all -it ghcr.io/accel-sim/accel-sim-framework:ubuntu-24.04-cuda-12.8 /bin/bash 
+
+## Build the image locally
+If you want to modify the Dockerfile and build your own image:
+```bash
+# from the directory containing the Dockerfile
+docker build -t accelsim/dev:local .
 ```
+
+
+---
+
+## Notes
+- Replace `<container_name>` with a descriptive name for your container.  
+- The `--runtime=nvidia --gpus all` flags ensure GPU access inside the container (requires NVIDIA Container Toolkit).  
+- Use the local tag `accelsim/dev:local` when running your custom build.  
+