Migrate files to new /config

https://github.com/alexbelgium/hassio-addons/issues/1048?notification_referrer_id=NT_kwDOAqIdGbQxNDkxMzI0ODYwODo0NDE3ODcxMw#event-16395784949

jellyfin/rootfs/etc/cont-init.d/01-migrate.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/with-contenv bashio
+# shellcheck shell=bash
+set -e
+
+slug=jellyfin
+
+# Migration to new /config logic
+if [[ "$LOCATION" == "/config/addons_config/"* ]]; then
+    bashio::log.warning "Data folder was $LOCATION, it is migrated to /config/data. The previous folder is renamed to _migrated"    
+    LOCATION="${LOCATION/config/homeassistant}"
+    mkdir -p /config/data
+    if [ -d $LOCATION ]; then
+        cp -rf "$LOCATION"/* /config/data/
+        mv "$LOCATION" "$LOCATION"_migrated
+    fi
+    bashio::addon.option "data_location" "/config/data"
+fi
+
+# Migrate autoscripts
+if [ -f "/homeassistant/addons_autoscripts/$slug.sh" ]; then
+    bashio::log.warning "Migrating autoscript"
+    mv /homeassistant/addons_autoscripts/$slug.sh /config/ || true
+fi
+
+# Migrate config.yaml
+if [ -f "/homeassistant/addons_config/$slug/config.yaml" ]; then
+    bashio::log.warning "Migrating config.yaml"
+    mv /homeassistant/addons_config/$slug/config.yaml /config/ || true
+fi