Add docker-compose basic config (#1538)

Add docker-compose.yml config for 0x-devnet package. This can be expanded upon in future if necessary.

packages/devnet/docker-compose.yml

@@ -0,0 +1,8 @@
+version: '3'
+services:
+  devnet:
+    image: 0x-devnet:latest
+    build:
+      context: .
+    ports:
+        - 8501:8501