Base Docker images used by light-curve packages

./python-linux

Multi-architecture images manylinux2014 and musllinux based on the official manylinux/musllinux PyPA images for aarch64, ppc64le, and x86_64 platforms. We use these images to build binary wheels of light-curve-python package. We add Rust toolchain, FFTW (compiled with platform-specific flags for SIMD) and GSL.