Fix Docker healthcheck output

The current healthcheck command results in progress info being output.
Add -f/--fail, -s/--silent, -S/--show-error options to avoid progress
output, but still show error messages if something goes wrong.

Dockerfile

@@ -89,4 +89,4 @@ ENTRYPOINT ["./jellyfin/jellyfin", \
     "--ffmpeg", "/usr/lib/jellyfin-ffmpeg/ffmpeg"]
 
 HEALTHCHECK --interval=30s --timeout=30s --start-period=10s --retries=3 \
-     CMD curl -Lk "${HEALTHCHECK_URL}" || exit 1
+     CMD curl -Lk -fsS "${HEALTHCHECK_URL}" || exit 1

Dockerfile.arm

@@ -78,4 +78,4 @@ ENTRYPOINT ["./jellyfin/jellyfin", \
     "--ffmpeg", "/usr/lib/jellyfin-ffmpeg/ffmpeg"]
 
 HEALTHCHECK --interval=30s --timeout=30s --start-period=10s --retries=3 \
-     CMD curl -Lk "${HEALTHCHECK_URL}" || exit 1
+     CMD curl -Lk -fsS "${HEALTHCHECK_URL}" || exit 1

Dockerfile.arm64

@@ -72,4 +72,4 @@ ENTRYPOINT ["./jellyfin/jellyfin", \
     "--ffmpeg", "/usr/bin/ffmpeg"]
 
 HEALTHCHECK --interval=30s --timeout=30s --start-period=10s --retries=3 \
-     CMD curl -Lk "${HEALTHCHECK_URL}" || exit 1
+     CMD curl -Lk -fsS "${HEALTHCHECK_URL}" || exit 1