feat(dev): add Docker Compose for Postgres and update Quick Start docs (closes #4)

README.md

@@ -79,6 +79,13 @@ cp UnsecuredAPIKeys.Bots.Verifier/appsettings.example.json UnsecuredAPIKeys.Bots
 ```
 
 ### 3. Start the Database
+
+**Option A: Docker Compose (recommended for dev)**
+```bash
+docker compose up -d db
+```
+
+**Option B: One-off container**
 ```bash
 docker run --name unsecured-api-keys-db \
   -e POSTGRES_DB=UnsecuredAPIKeys \
@@ -88,6 +95,15 @@ docker run --name unsecured-api-keys-db \
   -d postgres:15
 ```
 
+### Stopping the database
+```bash
+docker compose down
+```
+To also remove the dev volume:
+```bash
+docker compose down -v
+```
+
 ### 4. Run Database Migrations
 ```bash
 cd UnsecuredAPIKeys.WebAPI
@@ -120,6 +136,7 @@ dotnet run
 - **API**: http://localhost:7227
 - **API Documentation**: http://localhost:7227/scalar/v1
 
+
 ## 📚 Documentation
 
 - **[Deployment Guide](docs/DEPLOYMENT_GUIDE.md)** - Comprehensive deployment instructions

docker-compose.yml

@@ -0,0 +1,22 @@
+version: "3.9"
+
+services:
+  db:
+    image: postgres:15
+    container_name: unsecuredapikeys-db
+    environment:
+      POSTGRES_DB: UnsecuredAPIKeys
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+    ports:
+      - "5432:5432"
+    volumes:
+      - dbdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres -d UnsecuredAPIKeys"]
+      interval: 5s
+      timeout: 3s
+      retries: 20
+
+volumes:
+  dbdata: