chore: Update Makefile targets for local building and git update shorthand

Makefile

@@ -8,9 +8,9 @@ setup:
 test:
 	docker compose run --no-deps --rm edge-node pytest -v
 
-# Build all images locally and start.
+# Build all images locally and start (dev mode with local code mounted).
 up:
-	docker compose up -d
+	docker compose up -d --build
 
 # Pull pre-built images from the registry and start (no local build).
 # Requires IMAGE_REGISTRY, DOCKER_ORG, DOCKER_REPO set in .env.
@@ -21,6 +21,12 @@ up-prebuilt:
 pull:
 	docker compose pull
 
+# Helper to pull the latest git commits and rebuild/restart the dev stack.
+update-git:
+	git pull
+	docker compose build
+	docker compose up -d
+
 down:
 	docker compose down