Optimize Dockerfiles: Reduce Image Sizes and Improve Build Process

Genivia / ugrep

NEW ugrep 6.5: a more powerful, ultra fast, user-friendly, compatible grep. Includes a TUI, Google-like Boolean search with AND/OR/NOT, fuzzy search, hexdumps, searches (nested) archives (zip, 7z, tar, pax, cpio), compressed files (gz, Z, bz2, lzma, xz, lz4, zstd, brotli), pdfs, docs, and more

BSD 3-Clause "New" or "Revised" License

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Refactor Dockerfiles to optimize build, reduce sizes, and improve practices

Dockerfile

Set ugrep as the ENTRYPOINT for direct usage without starting bash.
Clarified comments with examples and use-cases.

Dockerfile-minimized

The original ubuntu image created by Dockerfile-minimized is about ~500MB. It appears that running apt-get remove doesn't remove the libraries themselves, thus creating an unnecessary large image. The new image is based on alpine, works exactly like Dockerfile and is 3.5x smaller (147MB on x64).

Replaced ubuntu base image (~500MB) with multi-build alpine (147MB).
Addressed issue with apt-get remove not reducing image size.

Genivia / ugrep

Optimize Dockerfiles: Reduce Image Sizes and Improve Build Process #408

Dockerfile

Dockerfile-minimized