Create Dockerfile

Dockerfile

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+# ===== BUILD STAGE =====
+FROM golang:1.22-alpine AS builder
+
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o app
+
+# ===== RUNTIME STAGE =====
+FROM alpine:latest
+
+WORKDIR /app
+COPY --from=builder /app/app .
+
+ENV PORT=7860
+EXPOSE 7860
+
+CMD ["./app"]