Set proper paths in nextcloudignore

Signed-off-by: Julius Härtl <jus@bitgrid.net>

.nextcloudignore

@@ -1,31 +1,31 @@
-build/
-.git
-js/node_modules
-js/tests
-js/legacy
-js/controller
-js/directive
-js/filters
-js/service
-js/bower.json
-js/.bowerrc
-js/.jshintrc
-js/Gruntfile.js
-js/package.json
-js/package-lock.json
-docs/
-tests
-.codecov.yml
-composer.json
-composer.lock
-_config.yml
-.drone.yml
-.travis.yml
-.eslintignore
-.eslintrc.yml
-.gitignore
-issue_template.md
-krankerl.toml
-Makefile
-mkdocs.yml
-run-eslint.sh
+/build/
+/.git
+/js/node_modules
+/js/tests
+/js/legacy
+/js/controller
+/js/directive
+/js/filters
+/js/service
+/js/bower.json
+/js/.bowerrc
+/js/.jshintrc
+/js/Gruntfile.js
+/js/package.json
+/js/package-lock.json
+/docs/
+/tests
+/.codecov.yml
+/composer.json
+/composer.lock
+/_config.yml
+/.drone.yml
+/.travis.yml
+/.eslintignore
+/.eslintrc.yml
+/.gitignore
+/issue_template.md
+/krankerl.toml
+/Makefile
+/mkdocs.yml
+/run-eslint.sh