chore: add license info to get-pipy.sh

Author: reaver-flomesh

get-pipy.sh

@@ -1,5 +1,22 @@
 #!/usr/bin/env bash
 
+# Copyright 2025 the flomesh.io Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# The install script is based off of the Apache 2.0-licensed script from helm,
+# https://github.com/helm/helm/blob/main/scripts/get-helm-3
+
 : ${BINARY_NAME:="pipy"}
 : ${USE_SUDO:="true"}
 : ${PIPY_INSTALL_DIR:="/usr/local/bin"}
@@ -203,4 +220,4 @@ checkDesiredVersion
 downloadFile
 installFile
 testVersion
-cleanup
+cleanup