feat: add verbose and dry run

README.md

@@ -10,10 +10,14 @@ You will need rust installed. Clone repo and run:
 cargo install --path .
 ```
 
-To print the underlying docker commands as they run, build with debug
-assertions:
+## seeing what it runs
+
+`-v` prints each docker command as it runs, and `--dry-run` prints the ones it
+would run without running them. Both work before or after the subcommand.
+
 ```bash
-cargo install --path . --debug
+ahab -v django test
+ahab --dry-run postgres import ./dump
 ```
 
 ## shell completion