feat: add update and start script for linux (#2107)

Reviewed-on: OpenWF/SpaceNinjaServer#2107
Co-authored-by: Sainan <sainan@calamity.gg>
Co-committed-by: Sainan <sainan@calamity.gg>

UPDATE AND START SERVER.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+echo "Updating SpaceNinjaServer..."
+git fetch --prune
+git stash
+git reset --hard origin/main
+
+if [ -d "static/data/0/" ]; then
+    echo "Updating stripped assets..."
+    cd static/data/0/
+    git pull
+    cd ../../../
+fi
+
+echo "Updating dependencies..."
+npm i --omit=dev
+
+npm run build
+if [ $? -eq 0 ]; then
+    npm run start
+    echo "SpaceNinjaServer seems to have crashed."
+fi
+