chore: add restart policy and modify readme.md

Author: SeUkKim

dockerfiles/README.md

@@ -3,7 +3,7 @@
 ### Prerequisite
 1. Create a .env file.
 - Add the following content to your `.env` file.
-```json
+```env
 POSTGRES_USER="postgres"
 POSTGRES_PASSWORD="postgres"
 POSTGRES_DB="core_indexer"

dockerfiles/docker-compose-informative.yml

@@ -6,6 +6,7 @@ services:
       POSTGRES_USER: ${POSTGRES_USER}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
       POSTGRES_DB: ${POSTGRES_DB}
+    restart: always
     ports:
       - "5432:5432"
     volumes: