Container Definitions to Run OpenWebUI (Ubuntu 24.04 / Dockerfile & Singularity)

• Unified base OS: Both Docker and Singularity use Ubuntu 24.04 to keep the runtime environment consistent.
• Minimal dependency set: Installs python3 and python3-venv, and ffmpeg for audio/video handling, using no-install-recommends.
• Reproducible, non-interactive builds: Fixes timezone to UTC and avoids interactive prompts via DEBIAN_FRONTEND=noninteractive (ARG in Dockerfile; applied during install in Singularity). Also cleans apt caches (apt-get clean and removing /var/lib/apt/lists/*) to reduce image size.

Bootstrap: docker
From: ubuntu:24.04

%post
    set -eux

    # timezone: UTC
    ln -sf /usr/share/zoneinfo/UTC /etc/localtime

    # packages
    apt-get update
    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends python3 python3-venv ffmpeg

    apt-get clean
    rm -rf /var/lib/apt/lists/*

# syntax=docker/dockerfile:1
FROM ubuntu:24.04

RUN set -eux; \
    # timezone: UTC
    ln -sf /usr/share/zoneinfo/UTC /etc/localtime; \
    \
    # packages
    apt-get update; \
    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends python3 python3-venv ffmpeg; \
    apt-get clean; \
    rm -rf /var/lib/apt/lists/*