Clarify defaults for running container image

README.md

@@ -59,7 +59,7 @@ Examples of config files are available in [examples/](examples/) dir.
 The [Dockerfile](./Dockerfile) in this repo can be used to build a container image
 that runs _zot_.
 
-To build the image:
+To build the image with ref `zot:latest`:
 
 ```
 make image
@@ -69,25 +69,21 @@ Then run the image with your preferred container runtime:
 
 ```
 # with podman
-podman run --rm -p 5000:5000 \
+podman run --rm -p 5000:5000 -v $(pwd)/registry:/var/lib/registry zot:latest
-  -v $(pwd)/registry:/var/lib/registry \
-  zot:latest
 
 # with docker
-docker run --rm -p 5000:5000 \
+docker run --rm -p 5000:5000 -v $(pwd)/registry:/var/lib/registry zot:latest
-  -v $(pwd)/registry:/var/lib/registry \
-  zot:latest
 ```
 
-By default, the server will use no auth, listen on port 5000,
+This will run a registry at http://localhost:5000, storing content at `./registry` 
-and store content at `/var/lib/registry`.
+(bind mounted to `/var/lib/registry` in the container). By default, auth is disabled.
 
 If you wish use custom configuration settings, you can override
 the YAML config file located at `/etc/zot/config.yml`:
 
 ```
 # Example: using a local file "custom-config.yml" that
-# listens on port 8080 and uses /tmp/zot for storage
+# listens on port 8080 and uses /tmp/zot for storage root
 podman run --rm -p 8080:8080 \
   -v $(pwd)/custom-config.yml:/etc/zot/config.yml \
   -v $(pwd)/registry:/tmp/zot \