Fixed container to use clang-format-12 and format on save

Author: stephanie-eng

.devcontainer/devcontainer.json

@@ -12,7 +12,9 @@
 
 	// Set *default* container specific settings.json values on container create.
 	"settings": { 
-		"terminal.integrated.shell.linux": "/bin/bash"
+		"terminal.integrated.shell.linux": "/bin/bash",
+		"editor.formatOnSave": true,
+		"clang-format.executable": "clang-format-12"
 	},
 
 	// Add the IDs of extensions you want installed when the container is created.
@@ -33,4 +35,4 @@
 	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
 	// "remoteUser": "vscode"
 	"remoteUser": "infinitime"
-}
+}