Update README and tweak default STACK_DIR

README.md

@@ -12,6 +12,31 @@ Docker stack magic 🎩🐇
 
 `make dev_install`
 
+## Specify what to deploy where
+
+You can use `abra` in one of 2 ways:
+
+1. Clone a `compose-stack`, create an `.envrc` in it, and run `abra` in that
+   directory. Be sure to set `ABRA_STACK_DIR=.`
+2. "Monorepo mode": keep all your `compose-stack`s in one directory and all your `env` files in
+   another, e.g.:
+   ```
+	 $ tree
+   .
+   ├── apps
+   │   ├── mediawiki.demo.autonomic.zone.env
+   │   ├── wordpress.demo.autonomic.zone.env
+   └── stacks
+       ├── gitea
+       ├── matrix-synapse
+       ├── mediawiki
+       ├── nextcloud
+       ├── swarmpit
+       ├── traefik
+       └── wordpress
+		$ abra -e apps/mediawiki.demo.autonomic.zone.env deploy
+    ```
+
 ## Examples
 
 ```

abra

@@ -92,7 +92,7 @@ if [ -z "$COMPOSE_FILE" ]; then
 fi
 
 if [ -z "$ABRA_STACK_DIR" ]; then
-	ABRA_STACK_DIR="../stacks/$SERVICE"
+	ABRA_STACK_DIR="stacks/$SERVICE"
 fi
 
 ###### Safety checks