Fixed content in Luigi post

Had some potentially misleading language in there that @vparekh94 pointed out. Pulled it out.

Fix image rendering issue

The image in the original publication wasn't hosted in the correct place on our CDN. Also fixed a few formatting issues.

Fix image + add link

v1.6.3

Add blank image

Fix description

v1.6.2

Add blank image

Docker guide

v1.6.1

Add blank image

Added Airflow vs. Luigi guide

Added a guide explaining the differences between Airflow and Luigi.

Added CI/CD video

1.4.5

adding video

Editing link of CI/CD guide

Sorry for the multiple rebuilds- missed a link issue.

Editing title of CI/CD guide

1.4.3

Formatting fix

Update ci/cd guide

v1.4.2

Generalized example