fix pnpm install

.gitlab-ci.yml

@@ -5,11 +5,7 @@ image: 'node:latest'
 
 before_script:
   - apt update -y
-  - if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
-    elif [ -f package-lock.json ]; then npm ci; \
-    elif [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm i --frozen-lockfile; \
-    else echo "Lockfile not found." && exit 1; \
-    fi
+  - corepack enable pnpm
   - mkdir public
 
 build:pretty-check: