Install, setup, usage stub howto

README.md

@@ -2,6 +2,38 @@
 
 ***PRE-ALPHA***
 
+One day, perhaps, this code will be able to generate nice
+plots to visualize radio interference.
+
+
+# Installation
+Install thusly, on Debian Bookworm (Testing).
+
+```
+sudo apt install python3-virtualenv python3-pip
+
+git clone https://spacecruft.org/spacecruft/plot-freely
+```
+
+# Setup
+Setup thusly.
+
+```
+cd plot-freely/
+virtualenv -p python3 env
+source env/bin/activate
+pip install --upgrade pip
+pip install -r requirements.txt
+```
+
+
+# Usage
+Use thusly.
+
+```
+./polar-plot
+```
+
 
 # Copyright
 Upstream sources under their respective copyrights.