fix: docker compose setup

[diofeher]

Fixes #292

Local environment setup was broken for registry-ui. This PR covers a few different problems:

1 - Search worker was not available on docker compose, always returning empty responses. I've added --ip=0.0.0.0 in order to make the server available.
2 - NeonDB Serverless doesn't work well with local databases using postgres protocol because it works using HTTP/Websockets. I've tried a few different approaches like neon-proxy (that uses HTTP/Websockets), but in the end I've used a "pg" Client.
3 - The search SQL was wrong and couldn't compile, so I've made a small change on its syntax to make it work.
4 - node_compat = true is used to have an usable "pg" package on R2 worker environment.
5 - adding script to populate r2 bucket + docs

Checklist

• I have read the contribution guide.
• I have not used an AI coding assistant to create this PR.
• My contribution is compatible with the MPL-2.0 license and I have provided a DCO sign-off on all my commits.
• I have written all code in this PR myself OR I have marked all code I have not written myself (including modified code, e.g. copied from other places and then modified) with a comment indicating where it came from.

[Gogotchuri]

Thanks for the PR, look good! Left a few nit and a question.

[Gogotchuri]

Looks good!