chore: update image postgresql (#212)

Author: Tony133

package.json

@@ -10,7 +10,7 @@
     "lint": "eslint",
     "lint:fix": "eslint --fix",
     "load-data": "docker exec -it fastify-postgres psql -c 'CREATE TABLE users(id serial PRIMARY KEY, username VARCHAR (50) NOT NULL);' -U postgres -d postgres",
-    "postgres": "docker run -p 5432:5432 --name fastify-postgres -e POSTGRES_PASSWORD=postgres -d postgres:11-alpine",
+    "postgres": "docker run -p 5432:5432 --name fastify-postgres -e POSTGRES_PASSWORD=postgres -d postgres:18-alpine",
     "test": "npm run test:unit && npm run test:typescript",
     "test:unit": "c8 --100 node --test",
     "test:report": "standard && c8 --reporter html node --test",