Minimal installation instructions.

README.md

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+# Web File Storage
+
+Development install:
+
+```sh
+python -m venv .venv        # Create virtual env
+. .venv/bin/activate
+pip install -e .            # Editable install
+sanic cista --reload --dev  # Runs on localhost:8000
+```
+
+Environment variable `STORAGE=<path>` may be used to choose which folder it serves. The default is current directory.
+
+No authentication is supported, so implement access control externally or be careful with your files.
+