diff --git a/.github/workflows/gem.yaml b/.github/workflows/gem.yaml
index 297d96b..5712e97 100644
--- a/.github/workflows/gem.yaml
+++ b/.github/workflows/gem.yaml
@@ -26,11 +26,10 @@ jobs:
         name: Publish to ${{ matrix.registry }}
         env:
           TRACE: ${{ secrets.ACTIONS_STEP_DEBUG || 'false' }}
+          GEM_NAME: linear-cli
           GEM_TOKEN: ${{ secrets[matrix.registry.secret] }}
           REGISTRY: ${{ matrix.registry.key }}
         run: |
           bundle install
           TRACE="$TRACE" GEM_TOKEN="$GEM_TOKEN" ./ci/publish-gem.sh "$REGISTRY"
         shell: bash
-        env:
-          GEM_NAME: linear-cli
diff --git a/Readme.adoc b/Readme.adoc
index fd39c77..c50760c 100644
--- a/Readme.adoc
+++ b/Readme.adoc
@@ -225,6 +225,13 @@ $ bundle exec rake
 $ bundle exec gem build
 ----
 
+=== Build the container
+
+[source,bash]
+----
+$ ./ci/build_image.sh <tag_name>
+----
+
 === Conventional Commits (semantic commit messages)
 
 This project follows the {conventional-commits} specification.