Update README with instructions for running the webserver

README.md

@@ -1,8 +1,23 @@
-Quick & dirty commit of current progress to share with others.
+# Installation
 
+Don't.
+
+# Development installation
+
+Create a virtual environment and install the development set:
 ```
 python -m venv venv
 source venv/bin/activate
 pip install --editable .[dev]
+```
+
+Set your save path and run the webserver to interact with the storage system:
+```
+export D2SAVE_PATH="/path/to/saves"
+flask --app d2warehouse.app run
+```
+
+Some debug tooling:
+```
 d2dump /path/to/stash.d2i
 ```