Fix CI

Author: vmcj

webapp/Makefile

@@ -34,7 +34,7 @@ install-domserver:
 	for d in bin config migrations public resources src templates tests vendor; do \
 		$(call install_tree,$(DESTDIR)$(domserver_webappdir),$$d) ; \
 	done
-	$(call fix_composer_paths,$(DESTDIR)$(domserver_webappdir)vendor)
+	$(call fix_composer_paths,$(DESTDIR)$(domserver_webappdir)/vendor)
 # Change webapp/public/doc symlink
 	rm $(DESTDIR)$(domserver_webappdir)/public/doc
 	ln -s $(domjudge_docdir) $(DESTDIR)$(domserver_webappdir)/public/doc