* Move application configuration to be loaded from environment variables
* Remove unused sentry.properties
* Make missing value sentinel a constant and ignore all *.env files
* Removed now-used ACL properties
* Prefix RapidAPI environment variable with APPSMITH_
* Fix application properties not being loaded into static fields
* Remove application-test.properties file
* Add required env variables for test in GitHub
* Quote URLs for MongoDB and Redis in test config
* Change RAPIDAPI to RAPID_API in environment variable names
* Source .env file in the root of repo in start script
Note that we have to delete the Mongo volume for the inidtb script to take effect. Else, it will not execute. To be used only for testing right now. Will figure out a more robust solution later.
Also using Google's JIB Maven plugin to reduce our Docker image footprint. Will make container upload and download much faster
