feat: use skylab in template

templates/docker/docker-compose.yml

@@ -1,13 +1,23 @@
 services:
-  juno-satellite:
-    image: junobuild/satellite:latest
+  juno-skylab:
+    image: junobuild/skylab:latest
     ports:
+      # Local replica used to simulate execution
       - 5987:5987
+      # Little admin server (e.g. to transfer ICP from the ledger)
       - 5999:5999
+      # Console UI (like https://console.juno.build)
+      - 5866:5866
     volumes:
-      - juno_satellite:/juno/.juno
+      # Persistent volume to store internal state
+      - juno_skylab:/juno/.juno
+      # Local dev config file to customize Satellite behavior
       - ./<JUNO_DEV_CONFIG>:/juno/<JUNO_DEV_CONFIG>
+      # Shared folder for deploying and hot-reloading serverless functions
+      # For example, when building functions in TypeScript, the output `.mjs` files are placed here.
+      # The container then bundles them into your Satellite WASM (also placed here),
+      # and automatically upgrades the environment.
       - ./target/deploy:/juno/target/deploy/
 
 volumes:
-  juno_satellite:
+  juno_skylab: