Integrate improvements from CrateDB Alt panel

[amotl]

About

CrateDB Alt panel has been improved recently. Thank you, @surister.
Note to self: Accompany those improvements by integrating them / building upon them here.

Details

Spots of integration interfaces: Service + HTTP.

• compose.yaml
• nginx.conf#L9-L11
• nginx.conf#L34-L48

References

• Naming things: Adjust base URI query parameter, default port, and Vite's base setting surister/cratedb-admin-alt#42
• surister/cratedb-admin-alt@0.3.3...5531cb0