Update Dockerfile for entrypoint.sh execution

exec of entrypoint.sh was giving an operation not permitted. The file did not have execution permission. Adding the line to add the execution permission and test ok.

Dockerfile

@@ -61,6 +61,7 @@ RUN apt-get update && apt-get install -y --no-install-suggests \
 
 COPY --chown=node:node --from=builder /ghostfolio/dist/apps /ghostfolio/apps
 COPY --chown=node:node ./docker/entrypoint.sh /ghostfolio/entrypoint.sh
+RUN chmod 0700 /ghostfolio/entrypoint.sh
 WORKDIR /ghostfolio/apps/api
 EXPOSE ${PORT:-3333}
 USER node