# Task 8: Create Dockerfile

## Task Description

**Files:**
- Create: `src/Fengling.AuthService/Dockerfile`
- Create: `src/Fengling.AuthService/.dockerignore`

## Implementation Steps

### Step 1: Create Dockerfile

Create: `src/Fengling.AuthService/Dockerfile`

```dockerfile
FROM mcr.microsoft.com/dotnet/aspnet:10.0 AS base
WORKDIR /app
EXPOSE 80

FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
WORKDIR /src
COPY ["Fengling.AuthService.csproj", "./"]
RUN dotnet restore "Fengling.AuthService.csproj"
COPY . .
WORKDIR "/src"
RUN dotnet build "Fengling.AuthService.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "Fengling.AuthService.csproj" -c Release -o /app/publish /p:UseAppHost=false

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "Fengling.AuthService.dll"]
```

### Step 2: Create .dockerignore

Create: `src/Fengling.AuthService/.dockerignore`

```
bin/
obj/
Dockerfile
.dockerignore
*.md
```

### Step 3: Commit

```bash
git add src/Fengling.AuthService/Dockerfile src/Fengling.AuthService/.dockerignore
git commit -m "feat(auth): add Dockerfile for containerization"
```

## Context

This task adds Docker support for containerization. The multi-stage Dockerfile builds the project in a SDK container and copies only the runtime to a lightweight runtime container.

**Tech Stack**: Docker, .NET 10.0

## Verification

- [ ] Dockerfile created with multi-stage build
- [ ] .dockerignore created
- [ ] Dockerfile uses .NET 10.0
- [ ] Exposes port 80
- [ ] Committed to git

## Notes

- Multi-stage build reduces image size
- Only runtime container in final image
- Ready for Kubernetes deployment