Add info about postgresql in README

README.md

@@ -62,3 +62,33 @@ To do the actual migration, then just run:
 ```
 # ./db-upgrade [ENVIRONMENT NAME]
 ```
+
+**Example docker-compose.yml for postgres**
+
+Execute this first:
+```bash
+mkdir data
+chmod o+rwx data
+```
+
+```yml
+version: '3.7'
+
+services:
+
+  db:
+    image: postgres:13
+    restart: always
+    environment:
+      POSTGRES_PASSWORD: postgres
+    ports:
+      - "5432:5432"
+    volumes:
+      - ./data:/var/lib/postgresql/data
+      - /var/run/postgresql:/var/run/postgresql
+
+networks:
+  default:
+    external: true
+    name: postgres
+```