chore: enable manual testing of migrations

[gastonfournier]

About the changes

This adds a Makefile to make it easy to test migrations from one version of Unleash to another.

The script depends on docker compose V2

Before starting: make sure you're inside test-migrations folder and run make clean to be in a clean state.

We can run 2 versions of Unleash side by side with a shared database (the second version will apply migrations to the DB):

UNLEASH_DOCKER_IMAGE=unleashorg/unleash-server:5.6.10 make start-unleash # defaults to port 4242
UNLEASH_DOCKER_IMAGE=unleashorg/unleash-server:latest make start-another-unleash # defaults to port 4243
make test # run basic UI tests against port 4242 (first image)
EXPOSED_PORT=4243 make test # run basic UI tests against port 4243

This also enables us to test our local repository with our code of Unleash server running at port 4244 (EXPOSE_PORT=4444 make run-current if you want to change it):

UNLEASH_DOCKER_IMAGE=unleashorg/unleash-server:5.6.10 make start-unleash # defaults to port 4242
make run-current # exposes the current backend at 4244

You can also connect the latest UI to any of the ports specified above, starting the UI at port 3000:

EXPOSED_PORT=4242 make run-current-ui # exposed port defaults to 4244 which is the port of the current backend

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Name	Status	Preview	Comments	Updated (UTC)
unleash-monorepo-frontend	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 14, 2023 0:27am

1 Ignored Deployment

Name	Status	Preview	Comments	Updated (UTC)
unleash-docs	⬜️ Ignored (Inspect)	Visit Preview		Dec 14, 2023 0:27am

[chriswk]

LGTM

[gastonfournier]

This way we can send DATABASE_URL instead of what we're doing currently. The problem with our current solution is that this db object always takes precedence