diff --git a/Dockerfile b/Dockerfile
index b670119..43a3b7b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM node:16-alpine
 
 ENV ZX_VERSION="7.0.7"
 
-RUN apk add --no-cache curl docker \
+RUN apk add --no-cache curl docker skopeo \
     && npm config set update-notifier false \
     && npm install --location=global zx@${ZX_VERSION}
 
diff --git a/README.md b/README.md
index 3a85fb7..84b2eb9 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,10 @@
 # docker-zx
 
-Dockerfile for running zx scripts.
+Dockerfile for running zx scripts. The container is based on the official Alpine Linux [Node](https://hub.docker.com/_/node) image. Some additional tools are installed inside the container:
+
+- [`curl`](https://curl.se/) - because everybody needs a swiss army knife
+- [`docker`](https://www.docker.com/) - in order to be able to run other containers
+- [`skopeo`](https://github.com/containers/skopeo) - because everybody needs a swiss army knife for docker
 
 ## Usage