revert(ci): no more bun

i give up. the bun wouldn't cool down.

.gitlab-ci.yml

@@ -7,13 +7,13 @@ stages:
 build_stage:
   stage: build
   # use node docker image as enviroment
-  image: oven/bun:debian
+  image: node:latest
   script:
     # install & build the NuxtJS application
     - apt update
     - apt-get install -y --no-install-recommends python3 build-essential
-    - bun install
-    - bun run --bun build
+    - npm install
+    - npm run build
   # define artifacts which are shared between stages
   artifacts:
     paths:
@@ -47,7 +47,7 @@ deploy_stage:
     # restart Node.js and reload nginx configuration
     - ssh rockfic@${DEPLOY_SERVER} 'mongosh mongodb://localhost --eval "use ${DB_NAME}; db.dropDatabase();"'
     - ssh rockfic@${DEPLOY_SERVER} 'cd migrator && bun install && bun run ./index.ts'
-    - ssh rockfic@${DEPLOY_SERVER} bun --watch run "~/rockfic-staging/.output/server/index.mjs" \&\>/dev/null \& disown \%1
+    - ssh rockfic@${DEPLOY_SERVER} node run "~/rockfic-staging/.output/server/index.mjs" \&\>/dev/null \& disown \%1
     - ssh rockfic@${DEPLOY_SERVER} systemctl reload apache2
   environment:
     name: staging