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Hello @Oliver Wilms I have test using the original Dockerfile:

# Stage 1
FROM node:8.17.0-alpine3.9 as node
LABEL maintainer "david.reche@intersystems.com"
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build

# Stage 2
FROM nginx:1.13.12-alpine
COPY --from=node /usr/src/app/dist/ /usr/share/nginx/html/
COPY ./nginx.conf /etc/nginx/conf.d/default.conf

and the image for web app is build ok

docker images

REPOSITORY                                TAG              IMAGE ID       CREATED          SIZE

iris-explorer                             v1.1.0           066bda214946   19 minutes ago   20.8MB

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