Use moz base-image
Use Spartacus env var + use WORKDIR instead of cd
Update note re intended usage
Add env config for docker
Merge pull request #537 from muffinresearch/update-dockerfile-to-use-moz-base-image

Use moz base-image
Commit from Mozilla Verbatim by user a.polivanchuk@outlook.com.: 3 of 111 strings translated (0 fuzzy).