diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..6d4e617
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,18 @@
+FROM golang:alpine AS build-env
+
+RUN apk --no-cache add git make build-base
+
+RUN git clone --depth 1 https://git.sirrow.work/sirrow/splaschedbot.git
+WORKDIR splaschedbot
+
+RUN mkdir -p /build
+RUN go mod tidy
+RUN go build -a -tags "netgo" -tags timetzdata -installsuffix netgo -ldflags="-s -w -extldflags \"-static\"" -o=/build/splaschedbot main.go
+
+FROM alpine:3.22
+
+RUN apk --no-cache add ca-certificates
+COPY --from=build-env build/splaschedbot /splaschedbot
+RUN chmod u+x /splaschedbot
+
+CMD ["/splaschedbot"]
\ No newline at end of file
diff --git a/main.go b/main.go
index 9c4e530..988f320 100644
--- a/main.go
+++ b/main.go
@@ -163,6 +163,9 @@ func battleScheduleSub(schedSub []BattleSchedudleSub) string {
 		*/
 		output += fmt.Sprintln()
 	}
+	if output == "" {
+		output = "現在、スケジュールはありません。\n"
+	}
 	return output
 }