diff --git a/pica-mattermost/.dockerignore b/pica-mattermost/.dockerignore
new file mode 100644
index 0000000000000000000000000000000000000000..1f3c76f245216b4cef1887f9481b89450259067e
--- /dev/null
+++ b/pica-mattermost/.dockerignore
@@ -0,0 +1 @@
+prometheus-exporter/