docs: initial readme

need to fill this in with the correct image urls later

Author: NeoScript

README.md

@@ -0,0 +1,21 @@
+# Pub/Sub Emulator Lite
+
+A minifid version of the google cloud pubsub emulator
+
+## Usage
+
+### docker compose
+```
+services:
+  pse-lite:
+    image: #tbd
+    ports:
+      - 8090:8090
+```
+
+### docker run
+Just pull the image and run it via `docker run`
+
+`docker run -p 8090:8090 (image)`
+
+Access it via `http://localhost:8090/`