Upgrade Express `v4` to Express `v5`

[lbroudoux]

Express v5 represents a major upgrade with breaking changes. This migration must be taken seriously.

[snakefood3232]

I see that you need a careful migration from Express v4 to v5 due to breaking changes. I'd handle this by first reviewing the current codebase for compatibility issues and then updating the necessary middleware and routing logic according to v5 documentation. I can have a PR up for you within 3 days. I've built similar upgrades in several projects before, ensuring smooth transitions without breaking functionality.

[lbroudoux]

Awesome! I don't have the bandwidth at the moment and any help is appreciated!