add docker compose and update deployment manual

docker-compose.yml

@@ -1,23 +1,14 @@
 version: "3.9"
 
 services:
-  postgres:
-    image: postgres:16
-    container_name: antrian_operasi
-    restart: unless-stopped
-    environment:
-      POSTGRES_USER: rssa
-      POSTGRES_PASSWORD: supersecret
-      POSTGRES_DB: antrian_operasi
+  api:
+    container_name: antrian-operasi-api
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: antrianoperasi-api:latest
+    env_file:
+      - .env
     ports:
-      - "5432:5432"
-    volumes:
-      - pgdata:/var/lib/postgresql/data
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U rssa -d antrian_operasi"]
-      interval: 5s
-      timeout: 5s
-      retries: 5
-
-volumes:
-  pgdata:
+      - "8080:8080"
+    restart: unless-stopped

readme.md

@@ -88,14 +88,13 @@ cd <project_name>
 go run ./migrations/seeder.go
 ```
 
-## Docker
+## Deployment
 ```bash
-// masuk ke root project
-cd <project_name>
+// 1. Sesuaikan environment di file .env
 
-// build docker image
-docker build -t antrianoperasi-api:latest .
+// 2. Build dan run container
+docker compose up -d --build
 
-// run docker container
-docker run -d --name antrian-operasi-api --env-file .env -p 8080:8080 antrianoperasi-api:latest
+// 3. Run container saja (case: .env saja yang berubah)
+docker compose up -d
 ```