feat: Notification service qo'shildi va RabbitMQ integratsiya qilindi

Dockerfile

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+FROM golang:alpine as build
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY . .
+
+RUN go build -o notification ./cmd/main.go
+
+FROM alpine
+
+WORKDIR /app
+
+COPY --from=build /app/notification .
+
+CMD ["./notification"]