feat: update CI/CD to use Bun

- Update Dockerfile to use oven/bun:alpine image
- Update PR workflow to use Bun (oven/setup-bun action)
- Update Test workflow to use Bun
- Update Release workflow to use Bun
- Remove test.yml workflow (redundant with PR workflow)
- Update Docker build commands to use Bun
- Docker build verified working

.gitea/workflows/release.yml

@@ -63,6 +63,11 @@ jobs:
             fi
           fi
 
+      - name: Setup Bun
+        uses: oven/setup-bun@v2
+        with:
+          bun-version: latest
+
       - name: Bump version
         id: version
         run: |
@@ -70,10 +75,10 @@ jobs:
           echo "Bumping version: $BUMP"
 
           # Run the bump script
-          node scripts/bump-version.js "$BUMP" --yes
+          bun run scripts/bump-version.js "$BUMP" --yes
 
           # Get new version
-          NEW_VERSION=$(node -p "require('./package.json').version")
+          NEW_VERSION=$(bun -e "console.log(require('./package.json').version)")
           echo "new_version=$NEW_VERSION" >> $GITHUB_OUTPUT
           echo "New version: $NEW_VERSION"
 
@@ -123,7 +128,7 @@ jobs:
           docker run --rm \
             -e DATABASE_URL="postgresql://user:pass@localhost:5432/dummy" \
             ${{ env.IMAGE_NAME }}-test:${{ steps.version.outputs.new_version }} \
-            npm run test:run
+            bun test
 
       - name: Build production image
         if: steps.commit.outputs.committed == 'true'