Please add docker file for testing this project

[onlycodergod]

dockerfile add please

[PurHur]

Hello,

i am a developer evangelist at the EnterpriseQualityCoding Company and here to help. A dev op proposed a docker file some time ago but its unclear if its production grade ready. We would really like to get your help testing following PR:
#542

Ps: Could you please test if the dockerfile runs without the cat image?