create default Config.elm in docker

Dockerfile

@@ -26,6 +26,7 @@ RUN chmod +x /docker-entrypoint.sh
 COPY ./elm.json.base ./elm-tooling.json ./index.html ./package*.json ./vite.config.js $WORKDIR/
 
 COPY ./config $WORKDIR/config
+RUN cp $WORKDIR/config/Config.elm.tmp $WORKDIR/config/Config.elm
 COPY ./src $WORKDIR/src
 COPY ./openapi $WORKDIR/openapi
 COPY ./public $WORKDIR/public