ci: 移除容器配置，改为 Runner 级别配置

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitea/workflows/ci.yaml

@@ -13,8 +13,6 @@ jobs:
   build:
     name: Build Check
     runs-on: ubuntu-latest
-    container:
-      image: node:20-bookworm
     steps:
       - name: Checkout
         uses: actions/checkout@v4

.gitea/workflows/deploy.yaml

@@ -15,8 +15,6 @@ jobs:
   build-and-push:
     name: Build and Push Images
     runs-on: ubuntu-latest
-    container:
-      image: catthehacker/ubuntu:act-latest
     outputs:
       image_tag: ${{ steps.meta.outputs.tag }}
     steps:
@@ -65,8 +63,6 @@ jobs:
   deploy:
     name: Deploy to Knative
     runs-on: ubuntu-latest
-    container:
-      image: node:20-bookworm
     needs: build-and-push
     steps:
       - name: Checkout