Improve docker-compose.yml (#358)

Author: vjik

docker-compose.yml

@@ -1,16 +1,13 @@
-version: '3'
-
 services:
   pgsql:
-    image: postgres:15
-    restart: always
+    image: postgres:16
     environment:
       POSTGRES_USER: root
       POSTGRES_PASSWORD: root
       POSTGRES_DB: yiitest
     ports:
-      # <Port exposed> : < PGSQL Port running inside container>
-      - '5432:5432'
-    expose:
-      # Opens port 5432 on the container
-      - '5432'
+      # <Port exposed> : <PGSQL Port running inside container>
+      - 5432:5432
+    volumes:
+      - type: tmpfs
+        target: /var/lib/postgresql/data

docs/internals.md

@@ -35,7 +35,7 @@ DB must be accessible by address `127.0.0.1`. If you use PHP via docker containe
 container. Use `docker run` command argument for it:
 
 ```shell
- --network container:yiisoft-db-pgsql-db
+--network container:yiisoft-db-pgsql-db
 ```
 
 ## Unit testing