Add radarr image

images/radarr/Dockerfile

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+FROM golang:latest as builder
+
+ARG TARGETARCH
+ARG VERSION
+
+# Install chisel and build rootfs with radarr dependencies
+RUN \
+    go install github.com/canonical/chisel/cmd/chisel@latest \
+    && mkdir /rootfs \
+    && chisel cut \
+        --release ubuntu-24.04 \
+        --root /rootfs \
+        base-files_base \
+        base-files_release-info \
+        base-passwd_data \
+        ca-certificates_data \
+        dotnet-runtime-8.0_libs \
+        libsqlite3-0_libs
+
+# Download radarr
+RUN \
+    case "${TARGETARCH}" in \
+        'amd64') export ARCH='x64' ;; \
+        'arm64') export ARCH='arm64' ;; \
+    esac \
+    && curl -L "https://github.com/Radarr/Radarr/releases/download/v${VERSION}/Radarr.master.${VERSION}.linux-core-${ARCH}.tar.gz" \
+    | tar xzf - -C / \
+    && rm -rf /Radarr/Radarr.Update
+
+FROM scratch
+COPY --from=builder /rootfs /
+COPY --from=builder /Radarr /Radarr
+
+ENTRYPOINT ["/Radarr/Radarr", "--nobrowser", "--data=/config"]

images/radarr/version.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+curl -s "https://api.github.com/repos/Radarr/Radarr/releases/latest" | jq -r '.name'