diff --git a/docker/alpine-core/Dockerfile b/docker/alpine-core/Dockerfile
index b075630..2d058d7 100644
--- a/docker/alpine-core/Dockerfile
+++ b/docker/alpine-core/Dockerfile
@@ -4,9 +4,6 @@ ENV DISPLAY :1
 # alternative 1024x768x16
 ENV RESOLUTION 1920x1080x24
 
-ENV VNC_PORT 5900
-ENV NOVNC_PORT 6080
-
 # setup desktop environment (xfce4), display server (xvfb), vnc server (x11vnc)
 RUN apk add --no-cache \
   xfce4 \
diff --git a/docker/alpine-core/README.md b/docker/alpine-core/README.md
index 5cf60c2..1bf1b2d 100644
--- a/docker/alpine-core/README.md
+++ b/docker/alpine-core/README.md
@@ -1,5 +1,12 @@
 ## alpine-core
 
+[![Docker Image Version (latest by date)][image-version]][repo-url]
+[![Docker Image Size (latest by date)][image-size]][repo-url]
+
+[image-version]: https://img.shields.io/docker/v/hckops/alpine-core?sort=date&style=for-the-badge
+[image-size]: https://img.shields.io/docker/image-size/hckops/alpine-core?color=orange&sort=date&style=for-the-badge
+[repo-url]: https://hub.docker.com/r/hckops/alpine-core
+
 ```bash
 # run base container
 docker run --rm -it alpine