Use a different directory for assets

.gitignore

@@ -1,4 +1,5 @@
 /api/node_modules
+/assets
 /assets.tar.gz
 /env*
 /node_modules

config.toml

@@ -8,6 +8,10 @@ theme = ["docsy"]
 
 disableKinds = ["taxonomy", "taxonomyTerm"]
 
+# Change the default for assets, because the old Python toolchain uses "assets" for build output.
+# When the old toolchain is retired we can switch back to the default here.
+assetDir = "assets-hugo"
+
 [languages]
 [languages.en]
 title = "Matrix Specification"