add usage notes

src/edgedb-cli/NOTES.md

@@ -1,4 +1,14 @@
+## Usage
 
+**The EdgeDB instance should not be in the same container as the CLI.** My experience doing so makes the `edgedb ui` command start failing once you restart the container. I recommend the following options:
+
+1. Use a docker-compose template with two services: one for the CLI and one for the EdgeDB instance.
+
+    You can either use the [javascript-node-edgedb](https://github.com/joshuanianji/devcontainer-templates/blob/main/src/javascript-node-edgedb) or the [rust-edgedb](https://github.com/joshuanianji/devcontainer-templates/blob/main/src/rust-edgedb) templates, or use them as references to make your own.
+
+    Once inside the devcontainer, you can run `edgedb instance link` to connect the CLI to the instance. Check the templates above for more details.
+
+2. Connect to a cloud instance [with `edgedb cloud`](https://docs.edgedb.com/cloud/cli).
 
 ## Notes on Volume Mounts