update: bump python_helpers to 1.3.0 or later to use Docker environment file loader.

README.md

@@ -7,7 +7,8 @@ Licensed under the [MIT License](LICENSE).
 ## Installation
 
 The `miab` command is installed into the active virtual environment by any of the methods below.
-The package depends on `cloud-tools`, which provides the `python_helpers` package.
+The package depends on `cloud-tools` 1.3.0 or later, which provides the `python_helpers`
+package.
 
 ### Local install
 
@@ -98,8 +99,9 @@ The hostname is parsed out of `MAILINABOX_BASE_URL` when `MIAB_HOST` is not set.
 
 ### Environment file
 
-`--env-file|-E` reads the same variables from a docker-style file, overriding any inherited
-from the shell. It is a global option and goes before the command name:
+`--env-file|-E` reads the same variables from a file in `docker run --env-file` syntax,
+overriding any inherited from the shell. It is a global option and goes before the command
+name:
 
 ```sh
 miab --env-file box.env list --type TXT
@@ -112,16 +114,7 @@ MIAB_USERNAME=admin@example.com
 MIAB_PASSWORD=password
 ```
 
-Blank lines and lines whose first non-blank character is `#` are ignored; every other line must
-be `NAME=VALUE`. Values are taken literally, as `docker run --env-file` does: quotes are kept
-rather than stripped, `#` after the `=` is part of the value, and no variable interpolation is
-performed.
-
-## Tests
-
-```sh
-python3 -m unittest discover -s tests
-```
+Parsing is done by `python_helpers.env.load_env_file`, which documents the full syntax.
 
 ## AI Disclaimer