diff --git a/.sourceignore b/.sourceignore
new file mode 100644
index 0000000..3ebf04e
--- /dev/null
+++ b/.sourceignore
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+# Flux source-controller's default ignore rules strip image files (*.png, *.jpg,
+# ...) from the build artifact. The platform-branding ConfigMap (configMapGenerator
+# in apps/production/kustomization.yaml) needs these branding assets in the build,
+# so re-include them. Negations are evaluated after the defaults.
+!apps/production/branding/logo.png
+!apps/production/branding/alpenglow.jpg