Update readme links and readiness check

root/etc/s6-overlay/s6-rc.d/init-jellyfin-config/run

@@ -1,4 +1,5 @@
 #!/usr/bin/with-contenv bash
+# shellcheck shell=bash
 
 # create directories
 mkdir -p \

root/etc/s6-overlay/s6-rc.d/init-jellyfin-video/run

@@ -1,4 +1,5 @@
 #!/usr/bin/with-contenv bash
+# shellcheck shell=bash
 
 FILES=$(find /dev/dri /dev/dvb /dev/vchiq /dev/vc-mem /dev/video1? -type c -print 2>/dev/null)
 
@@ -7,7 +8,7 @@ do
     VIDEO_GID=$(stat -c '%g' "$i")
     if ! id -G abc | grep -qw "$VIDEO_GID"; then
         VIDEO_NAME=$(getent group "${VIDEO_GID}" | awk -F: '{print $1}')
-        if [ -z "${VIDEO_NAME}" ]; then
+        if [[ -z "${VIDEO_NAME}" ]]; then
             VIDEO_NAME="video$(head /dev/urandom | tr -dc 'a-zA-Z0-9' | head -c8)"
             groupadd "$VIDEO_NAME"
             groupmod -g "$VIDEO_GID" "$VIDEO_NAME"
@@ -20,7 +21,7 @@ do
 done
 
 # openmax lib loading
-if [ -e "/opt/vc/lib" ] && [ ! -e "/etc/ld.so.conf.d/00-vmcs.conf" ]; then
+if [[ -e "/opt/vc/lib" ]] && [[ ! -e "/etc/ld.so.conf.d/00-vmcs.conf" ]]; then
     echo "[jellyfin-init] Pi Libs detected loading"
     echo "/opt/vc/lib" > "/etc/ld.so.conf.d/00-vmcs.conf"
     ldconfig

root/etc/s6-overlay/s6-rc.d/svc-jellyfin/data/check

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+PORT=$(xmlstarlet sel -T -t -v /NetworkConfiguration/HttpServerPortNumber /config/network.xml)
+
+if [[ $(curl -sL "http://localhost:${PORT:-8096}/health" | jq -r '.status' 2>/dev/null) = "Healthy" ]]; then
+    exit 0
+else
+    exit 1
+fi

root/etc/s6-overlay/s6-rc.d/svc-jellyfin/run

@@ -1,4 +1,5 @@
 #!/usr/bin/with-contenv bash
+# shellcheck shell=bash
 
 export \
     JELLYFIN_DATA_DIR="/config/data" \