Docker-compose error

#1

Hi there!

I follow the instructions and install all the requisites on a production server,
i try it on locally and run fine but when try to dockerize i got this error about volumen names

I use ruby.2.5.5 image in Docker file to avoid dependecies errors (original Dockerfile uses 2.4.9 image)

[…]
Successfully built bb4530a29274
Successfully tagged consul_app:latest
WARNING: Image for service app was built because it did not already exist. To rebuild this image you must use docker-compose build or docker-compose up --build.
Creating consul_app_run … error

ERROR: for consul_app_run Cannot create container for service app: create .: volume name is too short, names should be at least two alphanumeric characters

ERROR: for app Cannot create container for service app: create .: volume name is too short, names should be at least two alphanumeric characters
ERROR: Encountered errors while bringing up the project.
[…]

docker-compose.yml:

cat docker-compose.yml

version: “3”
services:

service configuration for our database

database:

# use the preferred version of the official Postgres image
# see https://hub.docker.com/_/postgres/
image: postgres:9.4.5

# persist the database between containers by storing it in a volume
volumes:
  - docker-example-postgres:/var/lib/postgresql/data

service configuration for our dockerized Rails app

app:

# use the Dockerfile next to this file
build: .
entrypoint: /usr/local/bin/entrypoint.sh
command: bundle exec rails s -p 3000 -b "0.0.0.0"
working_dir: /var/www/consul

# rely on the RAILS_ENV value of the host machine
# environment:
#RAILS_ENV: $RAILS_ENV

# makes the app container aware of the DB container
depends_on:
  - database

# expose the port we configured Unicorn to bind to
ports:
  - "3000:3000"
# map our application source code, in full, to the application root of our container
volumes:
  - .:/var/www/consul:delegated
  - bundle:/usr/local/bundle:delegated
  - "$SSH_AUTH_SOCK:/tmp/agent.sock"
environment:
  - SSH_AUTH_SOCK=/tmp/agent.sock

volumes:
docker-example-postgres: {}
bundle: {}

Any ideas? Thanks