build: copy package-lock.json into dist folder as well

Dockerfile.alpine

@@ -13,11 +13,9 @@ RUN npm ci && \
     rm -rf dist/node_modules && \
     mv dist/* \
       start-docker.sh \
-      package-lock.json \
       /usr/src/app/ && \
     rm -rf /usr/src/app/build
 
-#TODO: move package-lock copying into copy-dist
 #TODO: improve node_modules handling in copy-dist/Dockerfile -> remove duplicated work
 #      currently copy-dist will copy certain node_module folders, but in the Dockerfile we delete them again (to keep image size down),
 #      as we install necessary dependencies in runtime buildstage anyways