Config updates to support multiple data type processing

[iprotsyuk]

• made AWS region configurable parameter
• introduced variables for git repo URLs instead of hardcoded values
• updated nginx proxy routes for different types of isotope image storage

[intsco]

@iprotsyuk all the changes have been merged into iprotsyuk-stage-lcms-dev branch

[iprotsyuk]

Alright, I'm closing the PR then

[intsco]

@iprotsyuk for unification between components I created a new branch 'lcms-support' to replace 'iprotsyuk-stage-lcms-dev'