feat: devcontainer post-create

Author: senz

.devcontainer/devcontainer.json

@@ -14,13 +14,13 @@
 				"jock.svg"
 			]
 		}
-	}
+	},
 
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	// "forwardPorts": [],
 
 	// Use 'postCreateCommand' to run commands after the container is created.
-	// "postCreateCommand": "uname -a",
+	"postCreateCommand": ".devcontainer/post-create.sh"
 
 	// Configure tool-specific properties.
 	// "customizations": {},

.devcontainer/post-create.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+pipx install keymap-drawer