`xsv` is no longer maintained and the author recommends `xan` instead.
Fortunately, `xan` is very suitable for our use-case; is very efficient,
and produces no differences in our expected output.
This commit brings a complete overhaul of the build system:
- Creates a separation of concerns for 'local' and 'remote' building
* 'local' is built locally via the docker-finance `build` command
* 'remote' is built *outside* of the docker-finance `build` command
(pushed to a remote registry and then pulled by the 'local' build)
* Related refactoring
- Dockerfiles
- `lib_gen`
- Adds remote image 'hledger-suite'
* Provides the latest versions of all `hledger` related binaries
* No longer relies on package maintainers / out-dated packages
- Adds remote image 'docker-finance'
* Provides base image for 'finance' and 'dev-tools' images
- tags 'archlinux' | 'ubuntu' | 'dev-tools'
- Removes previous `hledger` related build modules
* Removes building any `hledger` related binaries locally
- Removes 'experimental' build
* End-user can use local custom Dockerfile and/or custom tag instead
- Updates the 'default' | 'slim' | 'tiny' | 'micro' build types
* Refactors build type requirements into separate build modules
- Adds 'fetch' module
- Adds 'track' module
- Adds 'user' module
* creates container user *after* base and all other modules
* allows for quick re-building across multiple local users
- Updates 'root' module
* `lib_docker`
- Updates usage help
- Adds build modules per build type
- Huge optimizations
* Vastly improves build times
- ~60% faster w/ a fresh build
- ~60%-90% faster rebuild (depending on image type)
* Vastly improves image sizes
- e.g., 'default' Arch Linux image size is ~50% smaller
