adding docker compose file

databaseSchema/docker-compose.yaml

@@ -0,0 +1,19 @@
+version: '3.8'
+
+services:
+  db:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    environment:
+      POSTGRES_DB: ${POSTGRESQL_DB}
+      POSTGRES_USER: ${POSTGRESQL_DB_USER}
+      POSTGRES_PASSWORD: ${POSTGRESQL_DB_PASSWORD}
+    ports:
+      - "5432:5432"
+    volumes:
+      - db-data:/var/lib/postgresql/data
+      - ./init.sql:/docker-entrypoint-initdb.d/init.sql
+
+volumes:
+  db-data: