Allow static apps to be hosted on Soapbox

[MickinSahni]

Problem: As is the case with dynamic apps, owners of static apps require hosting solutions so that they may build and deploy their apps.

*From roadmap:* Initial approach: repo + a dockerfile (that includes all depdencies e.g. jekyll, hugo) Tasks: creates cloudfront distribution + S3 bucket when creating an app; run docker, copy to s3, invalidate cache

Application Provision

• Rails application should offer option to specify static application on creation
• CreateApplicaiton has a function that run static terraform
• Terraform template for static application infrastructure - Issue: Terraform template for static application infrastructure #140
  • Terraform provisions in AWS
    • Route53 zone
    • CloudFront
    • S3 bucket

Application Deploy

• Assets are built for commit sha and uploaded to s3
• Update CloudFront distribution for blue environment by removing S3 bucket CNAME from Alternative Domain Names
• Update CloudFront distribution for green environment by adding S3 bucket CNAME to Alternative Domain Names
• Update Route53 A Alias record with CloudFront distribution Domain Name from green environment

[malford]

@paulsmith I have added some subtasks here for soapbox to provision a static application. Let me know if anything is missing.

[paulsmith]

@malford Looks good. So there would be an a and a b S3 bucket for each app, at any time one or the other is blue or green? Makes sense to me.

One implementation thought: user's supplied Dockerfile should encapsulate building their site, and when we do a docker run, we pass in a volume (using the --mount flag) that is the target root of what the site generator should output to. In other words, the user should set up there site generator to output to a known directory local in the container (like /site, perhaps -- maybe inject as a env var $SITE_OUTPUT_DIR or something), that is mapped to the directory controlled by the Soapbox building process.