fix(docker-compose): set container name for postgres instance

docker-compose.yml

@@ -1,17 +1,16 @@
 version: '3'
-
 services:
-
   flucky-db:
+    container_name: postgres
     environment:
-      - PGTZ=${TZ}
-      - POSTGRES_PASSWORD=${PG_PASSWORD}
-      - POSTGRES_USER=${PG_USER}
-      - POSTGRES_DB=${PG_NAME}
-      - TZ=${TZ}
+    - PGTZ=${TZ}
+    - POSTGRES_PASSWORD=${PG_PASSWORD}
+    - POSTGRES_USER=${PG_USER}
+    - POSTGRES_DB=${PG_NAME}
+    - TZ=${TZ}
     image: postgres:11.5-alpine
     ports:
-      - ${PG_EXTERN_PORT}:${PG_INTERN_PORT}/tcp
+    - ${PG_EXTERN_PORT}:${PG_INTERN_PORT}/tcp
     restart: always
     volumes:
-      - /etc/localtime:/etc/localtime:ro
+    - /etc/localtime:/etc/localtime:ro