Enable mDNS resolution in docker container

[derekoharrow]

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🏷️ Feature Request Type

Other

🔖 Feature description

Many devices now use mDNS for .local hostname resolution. It appears that Uptime Kuma cannot resolve these and that an mDNS resolver is not installed within the container, so you either have to hard-code IP addresses, or setup these devices in DNS.

✔️ Solution

As part of the Dockerfile, install libnss-mdns, and configure mDNS (nsswitch.conf) - e.g.

FROM ubuntu:22.04

RUN apt-get update && apt-get install -y \
    libnss-mdns \
    && rm -rf /var/lib/apt/lists/*

RUN sed -i 's/hosts:.*/hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4/' /etc/nsswitch.conf

❓ Alternatives

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📝 Additional Context

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