Add README.md.

README.md

@@ -0,0 +1,44 @@
+# Stable Diffusion Modal
+
+This is the script to execute Stable Diffusion on [Modal](https://modal.com/).
+
+## Requirements
+
+The app requires the following to run:
+
+- python: v3.10 >
+- modal-client
+- A token for Modal.
+
+The `modal-client` is the Python library. In order to install that:
+
+```
+pip install modal-client
+```
+
+And you need a modal token to use this script:
+
+```
+modal token new
+```
+
+Please see [the documentation of Modal](https://modal.com/docs/guide) for modals and tokens.
+
+## Getting Started
+
+To use the script, execute the below.
+
+```
+1. git clone the repository.
+1. Open the .env file and set a huggingface API token and a model.
+1. Open the Makefile and set prompts.
+1. Execute `make run` command.
+```
+
+Images are generated and output to the `outputs/` directory.
+
+Thank you.
+
+## Author
+
+[Hoda](https://hodalog.com)