The overall goal is to re-feed logs stored on S3 into an ElasticSearch (ES) cluster. The resulting binary is meant to be used as the value for ENTRYPOINT in this Dockerfile.

This code handles following tasks:

• writing template files based on values provided via environment variables,
• mounting an AWS S3 bucket with the help of s3fs-fuse,
• starting the Filebeat service to feed the logs into an ES cluster.