Bump library/node from 16-alpine to 21-alpine

Bumps library/node from 16-alpine to 21-alpine.

---
updated-dependencies:
- dependency-name: library/node
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM --platform=$TARGETPLATFORM docker.io/library/node:16-alpine as deemix
+FROM --platform=$TARGETPLATFORM docker.io/library/node:21-alpine as deemix
 
 ARG TARGETPLATFORM
 ARG BUILDPLATFORM
@@ -24,9 +24,9 @@ RUN yarn dist-server
 RUN mv /deemix-gui/dist/deemix-server /deemix-server
 
 
-FROM ghcr.io/hotio/lidarr:pr-plugins-2.0.7.3848
+FROM cr.hotio.dev/hotio/lidarr:pr-plugins-1.4.1.3564
 
-LABEL maintainer="ciapa"
+LABEL maintainer="youegraillot"
 
 ENV DEEMIX_SINGLE_USER=true
 ENV AUTOCONFIG=true
@@ -35,7 +35,8 @@ ENV PUID=1000
 ENV PGID=1000
 
 # flac2mp3
-RUN apk add --no-cache ffmpeg
+RUN apk add --no-cache ffmpeg && \
+    rm -rf /var/lib/apt/lists/*
 COPY lidarr-flac2mp3/root/usr /usr
 
 # deemix