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/c53b4f55472e517744d4db8a4ce5e9cff31514bb/deployment/Dockerfile.centos.amd64
You should set ROOT_URL correctly, otherwise the web may not work correctly.
FROM centos:7
# Docker build arguments
ARG SOURCE_DIR = /jellyfin
ARG ARTIFACT_DIR = /dist
ARG SDK_VERSION = 5 .0
# Docker run environment
ENV SOURCE_DIR = /jellyfin
ENV ARTIFACT_DIR = /dist
ENV IS_DOCKER = YES
# Prepare CentOS environment
RUN yum update -y \
&& yum install -y epel-release \
&& yum install -y @buildsys-build rpmdevtools yum-plugins-core libcurl-devel fontconfig-devel freetype-devel openssl-devel glibc-devel libicu-devel git
# Install DotNET SDK
RUN rpm -Uvh https://packages.microsoft.com/config/rhel/7/packages-microsoft-prod.rpm \
&& rpmdev-setuptree \
&& yum install -y dotnet-sdk-${ SDK_VERSION }
# Create symlinks and directories
RUN ln -sf ${ SOURCE_DIR } /deployment/build.centos.amd64 /build.sh \
&& mkdir -p ${ SOURCE_DIR } /SPECS \
&& ln -s ${ SOURCE_DIR } /fedora/jellyfin.spec ${ SOURCE_DIR } /SPECS/jellyfin.spec \
&& mkdir -p ${ SOURCE_DIR } /SOURCES \
&& ln -s ${ SOURCE_DIR } /fedora ${ SOURCE_DIR } /SOURCES
VOLUME ${SOURCE_DIR}/
VOLUME ${ARTIFACT_DIR}/
ENTRYPOINT [ "/build.sh" ]