[proposal] Change compiler/linker options, implement docker build, fix error handling and more

[Myshkouski]

I use this project to build a native app with Ktor server and Sqldelight.
Found some issues should be resolved before it could be done:

1. Compiling and testing this project on Linux targets is challenging.
This project doesn't use a common way of linking binaries with libpq shared library provided by standart package managers (see also this pull).
I've made some changes to libpq.def to overcome the issue to build on Ubuntu host.

Moreover, the majority of dependent projects would target a native (ktor server only, AFAIK) backend deployed inside a linux-based container.
This Dockerfile just gives an idea on how this project could be built for different target platforms in zero-config way.

2. Fatal errors on invalid queries
I have SEGFAULT when trying to execute and invalid SQL query. Seems this fixes an issue, but are there any reasons to call PQfinish on any exception?

TODO:

• revert groupId
• revert signing
• revert nexusPublishing

[hfhbd]

Hey, thanks for all the improvements, but can you please revert unnecessary changes? I also provided a devcontainer setup but you should avoid (if possible) running the Kotlin native compiler in a docker environment, it's incredible slow.

[hfhbd]

Regarding the segfault can you provide a reproducer?