Use template as devcontainer file suffix

Co-authored-by: Gang Wu <ustcwg@gmail.com>

Author: zhjwpku

.gitignore

@@ -29,7 +29,7 @@ cmake-build-release/
 
 # devcontainer
 .devcontainer/*
-!.devcontainer/*.sample
+!.devcontainer/*.template
 
 # meson subprojects - wrap files need to be kept to let meson download
 # dependencies as needed, but dependencies themselves should not be versioned

README.md

@@ -102,17 +102,17 @@ This will setup a git pre-commit-hook that is executed on each commit and will r
 
 ### Dev Containers
 
-We provide sample Dev Container configuration files.
+We provide Dev Container configuration file templates.
 
 To use a Dev Container as your development environment, follow the steps below, then select `Dev Containers: Reopen in Container` from VS Code's Command Palette.
 
 ```
 cd .devcontainer
-cp Dockerfile.sample Dockerfile
-cp devcontainer.json.sample devcontainer.json
+cp Dockerfile.template Dockerfile
+cp devcontainer.json.template devcontainer.json
 ```
 
-If you make improvements that could benefit all developers, please update the sample files and submit a pull request.
+If you make improvements that could benefit all developers, please update the template files and submit a pull request.
 
 ## License