can't start node server from CMD

Question

I am building a docker image with these Docker file:

FROM node:14.18.1-alpine as projectbuild
WORKDIR /app
ENV PATH /app/node_modules/.bin:$PATH
COPY . .
ARG NODE_ENV
RUN yarn
RUN yarn build

# production environment
FROM nginx:stable-alpine
WORKDIR /app
COPY --from=projectbuild /app/build /usr/share/nginx/html
COPY --from=projectbuild /app/node_modules /app/node_modules
COPY --from=projectbuild /app/server.js /app
COPY --from=projectbuild /app/package.json /app
RUN rm -rf /etc/nginx/conf.d
RUN apk add --update nodejs npm libc6-compat libstdc++ 
ADD entrypoint.sh /app
RUN chmod +x /app/entrypoint.sh
COPY conf /etc/nginx
EXPOSE 80
CMD ["sh", "-c", "nginx -g \"daemon off;\" ; npm run server"]

Unfortunately when I run it , only nginx seems to come alive , as it ignore the npm run server command.

I would appreciate any insights into what I am doing wrong.