use npm ci to install ui dependencies

docs/licenses/ui/timezone-js.txt

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+Copyright 2010 Matthew Eernisse (mde@fleegix.org) and Open Source Applications Foundation.
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+Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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+Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
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+Credits: Ideas included from incomplete JS implementation of Olson parser, "XMLDAte" by Philippe Goetz (philippe.goetz@wanadoo.fr)
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+Contributions:
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+- Jan Niehusmann
+- Ricky Romero
+- Preston Hunt (prestonhunt@gmail.com)
+- Dov. B Katz (dov.katz@morganstanley.com)
+- Peter Bergström (pbergstr@mac.com)
+- Long Ho (@longlho)
+- Eugeny Loy (eugeny.loy@gmail.com)