added build compose in root

docker-compose.yml

@@ -0,0 +1,13 @@
+version: "3"
+
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      target: base
+    container_name: go-watch
+    volumes:
+    - ./:/config
+    ports:
+    - "8080:8080"