added missing book.toml

.gitlab-ci.yml

@@ -68,7 +68,7 @@ documentation:pdf:
   script:
   - pwd
   - ls
-  - mdbook build ./documentation/ --dest-dir public
+  - mdbook build documentation --dest-dir public
   cache:
     paths:
     - /root/.cargo/bin/mdbook

documentation/book.toml

+[book]
+authors = []
+language = "en"
+multilingual = false
+src = "."