Merge pull request #82 from django-stars/clean-up-docker-resources-names

Update `docker-compose.yml` to use hyphen in all resources names instead of underscore

{{ cookiecutter.project_slug }}/docker/docker-compose.yml

@@ -1,4 +1,4 @@
-name: '{{ cookiecutter.project_slug }}'
+name: "{{ cookiecutter.project_slug|replace('_', '-') }}"
 
 # Configurations shared between api service, celery and celery beat.
 x-base-api: &base-api
@@ -42,11 +42,11 @@ services:
       POSTGRES_PASSWORD: {{ cookiecutter.__db_password }}
     image: postgres:{{ cookiecutter.postgresql_version }}-alpine
     volumes:
-      - pg_data:/var/lib/postgresql/data:rw
+      - pg-data:/var/lib/postgresql/data:rw
   redis-db:
     image: redis:{{ cookiecutter.redis_version }}-alpine
     volumes:
-      - redis_data:/data:rw
+      - redis-data:/data:rw
   mailpit:
     image: axllent/mailpit:latest
     ports:
@@ -60,7 +60,7 @@ services:
       MINIO_ACCESS_KEY: {{ cookiecutter.__minio_access_key }}
       MINIO_SECRET_KEY: {{ cookiecutter.__minio_secret_key }}
     volumes:
-     - minio_data:/data
+     - minio-data:/data
     command: [ "server", "--console-address", ":9001", "/data" ]
   createbuckets:
     image: minio/mc
@@ -74,6 +74,6 @@ services:
      exit 0;
      "
 volumes:
-  pg_data: {}
-  redis_data: {}
-  minio_data: {}
+  pg-data: {}
+  redis-data: {}
+  minio-data: {}