* Encrypting the password stored in AuthenticationDTO for every db.
* Adding comment to the properties file to denote that adding encryption salt and password are mandatory to the server coming up.
* Added the encryption salt and password to server.yml to allow the github actions to succeed.
* Adding database migration to encrypt the existing passwords for authentication object (used for storing db connection username/password)
Changes to the installation script install.sh:
1. Instead of overwriting the existing encryption password or salt, giving the user an option to conserve the previous encryption credentials to ensure that the developer users do not lose access to their database configurations (passwords).
2. Added another file for writing encryption credentials (encryption.env) to ensure that we dont delete the encryption password and salt by mistake.
* 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
* Adding the Github action workflow for the server code
* Modifying the redis endpoint in application-test.properties to point to localhost because the Docker service exposes ports to the host
