ci: add linter

.gitea/workflows/deploy.yaml

@@ -6,6 +6,7 @@ jobs:
   Explore-Gitea-Actions:
     runs-on: ubuntu-ci
     container:
+      image: ubuntu:ci
       volumes:
         - data:/var/data
         - deploy:/var/deploy
@@ -15,7 +16,7 @@ jobs:
       - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by Gitea!"
       - run: echo "🔎 The name of your branch is ${{ gitea.ref }} and your repository is ${{ gitea.repository }}."
       - name: Check out repository code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
       - run: echo "💡 The ${{ gitea.repository }} repository has been cloned to the runner."
@@ -26,6 +27,8 @@ jobs:
       - name: Check go version
         run: |
           go version
+      - name: Run golangci-lint
+        uses: golangci/golangci-lint-action@v9
       - name: Tests
         run: |
           cd ${{ gitea.workspace }}