Also still need to copy the contents of repo/ to the webroot for the index files to work properly.

Config/F-DroidRepo/Dockerfile

@@ -116,3 +116,8 @@ RUN fdroid update -c
 # Publish Repo Contents to Web Root #
 
 RUN cp -r "$FDROID" "$WEBROOT/"
+
+# The index files are in repo.
+# TODO: Can NGINX be configured to serve this as root while still
+#       having the URL be fdroid/repo/? How do others handle this?
+RUN cp -r "$REPO"/* "$WEBROOT/"