첫 커밋: 로컬 프로젝트 업로드

baron-sso/backend/Dockerfile

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+FROM golang:1.26.2-alpine
+
+WORKDIR /app
+
+# Install git for go mod download if needed
+RUN apk add --no-cache git
+
+# Pre-copy go.mod/sum to cache dependencies
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source
+COPY . .
+
+# Build for production (optional, can just run go run for dev)
+RUN go build -o main ./cmd/server
+
+EXPOSE 3000
+
+# Default command (can be overridden by compose)
+CMD ["./main"]