README: Updated install instructions

Also added stuff about how to run the tests

README.md

@@ -1,3 +1,34 @@
 # Graph_lib
 
-A library for directed and undirected networks and related graph algorithms. WIP.
+A library for directed and undirected networks and related graph algorithms. WIP.
+
+# Compilation and Running 
+
+If you want to use [`micromamba`](https://mamba.readthedocs.io/en/latest/user_guide/micromamba.html) as the package manager, create and activate the environment.
+
+```bash
+micromamba create -f environment.yml
+micromamba activate seldonenv
+```
+
+We use `meson` to compile and build Seldon. 
+
+```bash
+meson setup build
+meson compile -C build
+```
+
+To install `seldon` to your `conda` environment, run the following:
+
+```bash
+meson setup build --prefix $CONDA_PREFIX
+meson install -C build
+```
+
+## Running Tests
+
+To run the tests, go into the build directory and run the following: 
+
+```bash
+meson test
+```