Assuming you have awslocal installed in init.sh.
docker-compose up
Wait for localstack to be ready.
bash ./init.sh
awslocal lambda invoke --function-name SQSTest outfile.txt
awslocal sqs send-message --message-body="{}" --queue-url "http://localhost:4576/queue/test_queue"
awslocal sqs receive-message --queue-url "http://localhost:4576/queue/test_queue"