install deps in devcontainer

.devcontainer/devcontainer.json

@@ -6,13 +6,13 @@
 	"image": "mcr.microsoft.com/devcontainers/python:1-3.12-bullseye",
 	"features": {
 		"ghcr.io/devcontainers-contrib/features/poetry:2": {}
-	}
+	},
 
 	// 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": "pip3 install --user -r requirements.txt",
+	"postCreateCommand": "poetry install"
 
 	// Configure tool-specific properties.
 	// "customizations": {},