fix: source with glob and add secret

.drone.yml

@@ -57,7 +57,7 @@ steps:
     bucket: raw
     access_key: $MINIO_ACCESS_KEY
     secret_key: $MINIO_SECRET_KEY
-    source: ./
+    source: ./*
     target: /
     exclude: ".git/"
     exclude: "config"
@@ -65,3 +65,8 @@ steps:
     exclude: "tools/"
     exclude: "*.rst"
     exclude: "*.tex"
+  environment:
+    MINIO_ACCESS_KEY:
+      from_secret: minio_access_key
+    MINIO_SECRET_KEY:
+      from_secret: minio_secret_key