update readme with repo installation/execution instructions

README.md

@@ -7,3 +7,25 @@ These viewing methods are intended to be as simple as possible, mostly focusing
 Planned are text files, source code files, PDFs, and pictures. Everything else will be served as direct browser links (the browser handles all viewing) or as downloads.
 
 The project will be built in Django (as well as HTML/CSS/JS), my first ever project in the framework, so expect poorer standards, mishaps, some complex bugs (resolved with needlessly complex solutions) and such.
+
+## Setup
+
+```
+git clone https://github.com/Xevion/simple-viewer.git
+pip install -r requirements.txt
+```
+
+Additionally, during development, you will want Sass files to be updated.
+
+In a separate terminal, run this command to automatically generate .css files from .scss files when they are edited.
+
+```
+cd ./viewer/static/css/
+sass --watch .
+```
+
+## Running `simple-viewer`
+
+```
+python manage.py runserver
+```