diff --git a/README.md b/README.md
index 4775e35..be83d77 100644
--- a/README.md
+++ b/README.md
@@ -4,5 +4,13 @@ Forgejo action to use Godot for Continuous Integration.
 
 Based on https://github.com/abarichello/godot-ci/tree/master
 
+## How to
+### Create docker image:
+1. Login to forgejo container registry: `docker login git.antonio-da.dev`
+1. Build docker image: `docker build -t git.antonio-da.dev/antoniodell/godot-ci:<tag>`, where tag is current tag +1
+1. Push to forgejo container registry: `docker push git.antonio-da.dev/antoniodell/godot-ci:<tag>`, where tag is the one from the previous step
+
+Note: If you don't increase the tag, Actions could use a cached version of the container.
+
 ## TODOs
 1. Create workflow to build docker image and push to forgejo repo
\ No newline at end of file