Your ROOT_URL in app.ini is https://git.cloudchain.link/ but you are visiting https://dash.bss.nz/open-source-mirrors/jellyfin/blame/commit/d720d8f3569a0db11ba170c92d8d4ff055c4eaa9/deployment/win-x64/Dockerfile
You should set ROOT_URL correctly, otherwise the web may not work correctly.
FROM debian:10
# Docker build arguments
ARG SOURCE_DIR = /jellyfin
ARG PLATFORM_DIR = /jellyfin/deployment/win-x64
ARG ARTIFACT_DIR = /dist
ARG SDK_VERSION = 3 .0
# Docker run environment
ENV SOURCE_DIR = /jellyfin
ENV ARTIFACT_DIR = /dist
ENV DEB_BUILD_OPTIONS = noddebs
ENV ARCH = amd64
# Prepare Debian build environment
RUN apt-get update \
&& apt-get install -y apt-transport-https debhelper gnupg wget devscripts mmv libc6-dev libcurl4-openssl-dev libfontconfig1-dev libfreetype6-dev libssl-dev libssl1.1 liblttng-ust0 zip
# Install dotnet repository
# https://dotnet.microsoft.com/download/linux-package-manager/debian9/sdk-current
RUN wget https://download.visualstudio.microsoft.com/download/pr/4f51cfd8-311d-43fe-a887-c80b40358cfd/440d10dc2091b8d0f1a12b7124034e49/dotnet-sdk-3.0.101-linux-x64.tar.gz -O dotnet-sdk.tar.gz \
&& mkdir -p dotnet-sdk \
&& tar -xzf dotnet-sdk.tar.gz -C dotnet-sdk \
&& ln -s $( pwd ) /dotnet-sdk/dotnet /usr/bin/dotnet
# Install yarn package manager
RUN wget -q -O- https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
&& echo "deb https://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list \
&& apt update \
&& apt install -y yarn
# Link to docker-build script
RUN ln -sf ${ PLATFORM_DIR } /docker-build.sh /docker-build.sh
VOLUME ${ARTIFACT_DIR}/
COPY . ${ SOURCE_DIR } /
ENTRYPOINT [ "/docker-build.sh" ]