Merge branch 'add_beat_env_example' into 'master'

Update docker related information

See merge request !127
5 jobs for master in 26 minutes and 13 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #207756
docker-build
build_linux_36

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64.0%
passed #207757
docker-build
build_linux_37

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64.0%
passed #207754
macosx
build_macosx_36

00:24:43

64.0%
passed #207755
macosx
build_macosx_37

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64.0%
 
  Deploy
passed #207758
docker
deploy_beta

00:01:28