Exclude vendor directory from build

docs/_config.yml

@@ -7,4 +7,7 @@ remote_theme: pmarsceill/just-the-docs
 #color_scheme: "dark"
 aux_links:
     "Theodolite on GitHub":
-      - "//github.com/cau-se/theodolite"
+      - "//github.com/cau-se/theodolite"
\ No newline at end of file
+
+exclude:
+  - vendor