feat: add docker compose

comets_shinyapp_example/docker-compose.yml

@@ -0,0 +1,20 @@
+version: '3.9'
+
+services:
+  shiny:
+    build: .
+    #image: hicsail/comets_shinyapp:master
+    container_name: shiny_app
+    ports:
+      - "3838:3838"
+    restart: unless-stopped
+  postgres:
+    image: postgres:13
+    container_name: postgres
+    environment:
+      POSTGRES_USER: shiny
+      POSTGRES_PASSWORD: password
+      POSTGRES_DB: shiny
+    ports:
+      - "5432:5432"
+    restart: unless-stopped