Feat/localstack

[gweiying]

Current test instructions:

• Start up
• Create API key for admin user abc@open.gov.sg
• Set API key in local .env file ADMIN_API_KEY=<key_here>
• Set ACTIVATE_BULK_QR_CODE_GENERATION=true in docker_compose.yml
• Kill app and rerun so that Lambda function injects API key

Manual e2e tests
If bulk QR code is activated, in progress status bar should appear after uploading bulk file.
If bulk QR code is activated, in progress status bar should change to green within 2 mins after uploading bulk file.
Should be able to download csv, zipped png and zipped svg from success status bar
Downloaded csv should have all created links
Downloaded zipped QR code folders should have QR code files for all created links
Should receive email to download zipped png and zipped svg files

Todo:

• Rebase after test(integration): add integration test setup and url tests #2019 is merged and use the DB util functions to create admin user
• Png fonts still not working it seems!