feat: migrate to LiteFS-supervised container architecture

Dockerfile

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+# Stage 1: Get LiteFS binary
+FROM flyio/litefs:0.5 AS litefs
+
+# Stage 2: Final image
+FROM ghcr.io/navidrome/navidrome:latest
+
+# Install FUSE and CA certificates (needed for LiteFS)
+USER root
+RUN apk add --no-cache fuse3 ca-certificates
+
+# Copy LiteFS binary
+COPY --from=litefs /usr/local/bin/litefs /usr/local/bin/litefs
+
+# Copy LiteFS configuration
+COPY litefs.yml /etc/litefs.yml
+
+# We'll use environment variables for most LiteFS settings, 
+# but the baked-in config provides the structure.
+# LiteFS will mount the FUSE fs and then execute Navidrome.
+ENTRYPOINT ["litefs", "mount", "--", "/app/navidrome"]