diff --git a/README.md b/README.md
index 3aa85d0..2826bef 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,10 @@
 A simple docker image I used to teach me the basics of docker images and how to build them.
 
 
+## Build the container
+
+To build the container to an image called "cmatrix-demo", run
+
+```sh
+docker build -t cmatrix-demo .
+```
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