fix: production URLs, seed __dirname, CI/CD runner with pre-installed SSH

.gitea/workflows/deploy.yml

@@ -6,16 +6,12 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    container:
+      image: ci-runner:latest
     defaults:
       run:
         shell: sh
     steps:
-      - name: Install SSH client
-        run: |
-          V=$(cut -d'.' -f1-2 /etc/alpine-release)
-          echo "https://dl-cdn.alpinelinux.org/alpine/v$V/main" > /etc/apk/repositories
-          echo "https://dl-cdn.alpinelinux.org/alpine/v$V/community" >> /etc/apk/repositories
-          apk add --no-cache openssh-client
       - name: Setup SSH key
         env:
           SSH_KEY: ${{ secrets.DEPLOY_KEY }}