Build Caddy monthly

.gitea/workflows/caddy.yaml

@@ -9,8 +9,8 @@ on:
     paths:
       - ".gitea/workflows/caddy.yaml"
       - "dockerfiles/caddy.Dockerfile"
-#  schedule:
-#    - cron: "0 0 * * *" # at midnight
+  schedule:
+    - cron: "0 0 1 * *" # monthly
 
 jobs:
   build:
@@ -70,4 +70,4 @@ jobs:
             STORED_COMMIT=$(curl -H "Authorization: Bearer ${{ secrets.NT }}" -s "https://nt.opnxng.com/${REPO_NAME}/raw?poll=1" | tail -n 1)
             echo "STORED_COMMIT=${STORED_COMMIT}" >> "$GITHUB_ENV"
             exit 1
-          fi
+          fi