diff --git a/Dockerfile b/Dockerfile
index f61b757..8b9d084 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,10 +5,18 @@ COPY docs/config-docker.yml /root/.salty-dog.yml
 
 # copy package first, to invalidate other layers when version changes
 COPY package.json /salty-dog/package.json
+
+# copy chunks, largest to smallest (entrypoint)
 COPY out/vendor.js /salty-dog/out/vendor.js
-COPY out/index.js /salty-dog/out/index.js
 COPY out/main.js /salty-dog/out/main.js
+COPY out/index.js /salty-dog/out/index.js
+
+# set up as global cli tool
+WORKDIR /salty-dog
+RUN yarn global add file:$(pwd)
+ENV PATH="${PATH}:$(yarn global bin)"
 
 COPY rules /salty-dog/rules
 
-ENTRYPOINT [ "node", "/salty-dog/out/index.js" ]
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+ENTRYPOINT [ "node", "/salty-dog/out/index.js" ]
+CMD [ "--help" ]
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