♻️ Simplify tests, run in same backend service (#152)

remove backend-tests

{{cookiecutter.project_slug}}/scripts/test.sh

@@ -3,17 +3,16 @@
 # Exit in case of error
 set -e
 
-DOMAIN=backend \
+DOMAIN=backend SMTP_HOST="" \
 docker-compose \
 -f docker-compose.shared.base-images.yml \
 -f docker-compose.shared.env.yml \
 -f docker-compose.shared.depends.yml \
 -f docker-compose.deploy.build.yml \
--f docker-compose.test.yml \
 config > docker-stack.yml
 
 docker-compose -f docker-stack.yml build
 docker-compose -f docker-stack.yml down -v --remove-orphans # Remove possibly previous broken stacks left hanging after an error
 docker-compose -f docker-stack.yml up -d
-docker-compose -f docker-stack.yml exec -T backend-tests /tests-start.sh "$@"
+docker-compose -f docker-stack.yml exec -T backend bash /app/tests-start.sh "$@"
 docker-compose -f docker-stack.yml down -v --remove-orphans