Update README.md to incorporate ubuntu fixes

README.md

@@ -14,7 +14,14 @@ The code for the server is located in the [`backend`](./backend) directory.
 
 3. Install the OS & pip dependencies.
 ```
+# On MacOS with brew
 brew install gdal libgeoip
+# On Ubuntu
+sudo add-apt-repository ppa:ubuntugis/ppa
+sudo apt-get update
+sudo apt-get install libgeoip-dev libgdal-dev gdal-bin
+sudo apt-get install postgresql-12-postgis-3
+# On everything
 pip install -r requirements-test.txt
 pip install -r requirements.txt
 ```
@@ -51,4 +58,4 @@ The code for the frontend is located in the [`src`](./src) directory. You can st
 ```
 ./bin/start
 ```
-The server is now running at [`http://localhost:8000/`](http://localhost:8000/). **Warning:** Don't visit `localhost:3000` as the raw frontend will not work as expected.
+The server is now running at [`http://localhost:8000/`](http://localhost:8000/). **Warning:** Don't visit `localhost:3000` as the raw frontend will not work as expected.