ci: Update Docker workflow to remove main branch trigger and adjust R…

…EADME for Docker usage

.github/workflows/docker-image.yml

@@ -2,8 +2,8 @@ name: build & push Docker image to ghcr
 
 on:
   push:
-    branches:
-      - main  # Runs when pushing to develop branch
+    # branches:
+    #   - main  # Runs when pushing to develop branch
     tags:
       - v*  # Runs when pushing tags starting with 'v'
 

README.md

@@ -27,10 +27,19 @@
 To use the Docker image, you can pull it from the GitHub Container Registry and run it as follows:
 
 ```bash
+    # Get it without building anything locally
+    # without GPU
+    docker run --rm -it ghcr.io/ins-amu/vbi:main
+
+    # with GPU
+    docker run --gpus all --rm -it ghcr.io/ins-amu/vbi:main
+
+
+    # or build it locally:
     docker build -t vbi-project .         # build
     docker run --gpus all -it vbi-project # use with gpu
 
-    # Output something like this:
+    # Output is expected to be something like this:
 
                 Dependency Check              
 
@@ -54,6 +63,9 @@ To use the Docker image, you can pull it from the GitHub Container Registry and
     Total Memory: 23.68 GB
     Compute Capability: 8.6
 
+    ```
+
+
 ```