feat: relocate scripts, PATH update (#20002)

Relocate scripts, and PATH updates

server/bin/start.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+echo "Initializing Immich $IMMICH_SOURCE_REF"
+
+lib_path="/usr/lib/$(arch)-linux-gnu/libmimalloc.so.2"
+if [ -f "$lib_path" ]; then
+  export LD_PRELOAD="$lib_path"
+else
+  echo "skipping libmimalloc - path not found $lib_path"
+fi
+export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/lib/jellyfin-ffmpeg/lib"
+SERVER_HOME=/usr/src/app
+
+read_file_and_export() {
+	if [ -n "${!1}" ]; then
+		content="$(cat "${!1}")"
+		export "$2"="${content}"
+		unset "$1"
+	fi
+}
+read_file_and_export "DB_URL_FILE" "DB_URL"
+read_file_and_export "DB_HOSTNAME_FILE" "DB_HOSTNAME"
+read_file_and_export "DB_DATABASE_NAME_FILE" "DB_DATABASE_NAME"
+read_file_and_export "DB_USERNAME_FILE" "DB_USERNAME"
+read_file_and_export "DB_PASSWORD_FILE" "DB_PASSWORD"
+read_file_and_export "REDIS_PASSWORD_FILE" "REDIS_PASSWORD"
+
+if CPU_CORES="${CPU_CORES:=$(get-cpus.sh 2>/dev/null)}"; then
+  echo "Detected CPU Cores: $CPU_CORES"
+  if [ "$CPU_CORES" -gt 4 ]; then
+    export UV_THREADPOOL_SIZE=$CPU_CORES
+  fi
+else
+  echo "skipping get-cpus.sh - not found in PATH or failed: using default UV_THREADPOOL_SIZE"
+fi
+
+if [ -f "${SERVER_HOME}/dist/main.js" ]; then
+  exec node "${SERVER_HOME}/dist/main.js" "$@"
+else
+  echo "Error: ${SERVER_HOME}/dist/main.js not found"
+  if [ "$IMMICH_ENV" = "development" ]; then
+    echo "You may need to build the server first."
+  fi
+  exit 1
+fi