entrypoint.sh exec: #: not found - ruby-on-rails

Question

I was following this tutorial:
https://docs.docker.com/compose/rails/
I want to create a Ruby On Rails API with PostgreSQL Database (Dockerized)
But when I run
docker-compose run web rails new . --force --no-deps --api --database=postgresql
I got this:
Creating soft-vape-db ... done
/usr/bin/entrypoint.sh: line 8: exec: #: not found
entrypoint.sh
#!/usr/bin/env bash
set -e
rm -f /myapp/tmp/pids/server.pid
exec "$#"
Dockerfile
FROM ruby:2.5
RUN apt-get update -qq && apt-get install -y nodejs postgresql-client
RUN mkdir /myapp
WORKDIR /myapp
COPY Gemfile /myapp/Gemfile
COPY Gemfile.lock /myapp/Gemfile.lock
RUN bundle install
COPY . /myapp
COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]
EXPOSE 3000
CMD ["rails", "server", "-b", "0.0.0.0"]
docker-compose.yml
version: '3'
services:
db:
container_name: soft-vape-db
image: postgres
volumes:
- ./tmp/db:/var/lib/postgresql/data
web:
container_name: soft-vape-api
build: .
command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
volumes:
- .:/myapp
ports:
- "3000:3000"
depends_on:
- db
Any idea ?

Answer 1

The question is quite old but I also had this problem when using the example from docs so I hope this helps someone. The solution is pretty simple.
The rails new command should be prepended with bundle exec.
So run docker-compose run web bundle exec rails new . --force --no-deps --api --database=postgresql