diff --git a/.gitea/workflow/ci.yaml b/.gitea/workflow/ci.yaml
new file mode 100644
index 0000000..2f53e20
--- /dev/null
+++ b/.gitea/workflow/ci.yaml
@@ -0,0 +1,31 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - "main"
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64
+          tags: |
+            esinio/gitea-runner-ci-demo:latest
+            
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..abcf14d
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,20 @@
+FROM golang:alpine as build
+
+WORKDIR /go/src
+
+ADD . .
+
+RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/g' /etc/apk/repositories \
+    && apk --no-cache add ca-certificates \
+    && go env -w GOPROXY='https://goproxy.cn,direct' \
+    && go mod tidy \
+    && go build -o /go/bin/app .
+
+FROM scratch
+# copy the ca-certificate.crt from the build stage
+COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=build /go/bin/app /app
+
+EXPOSE 80
+
+ENTRYPOINT ["/app"]
\ No newline at end of file
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..450e775
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module github.com/gitea/runner-ci-demo
+
+go 1.18
+
+require github.com/gorilla/mux v1.8.1
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..7128337
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
+github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..522b5ef
--- /dev/null
+++ b/main.go
@@ -0,0 +1,37 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"time"
+
+	"github.com/gorilla/mux"
+)
+
+func main() {
+	r := mux.NewRouter()
+	r.HandleFunc("/", HomeHandler)
+	r.HandleFunc("/now", TimeHandler)
+	http.Handle("/", r)
+
+	srv := &http.Server{
+		Handler: r,
+		Addr:    "0.0.0.0:80",
+		// Good practice: enforce timeouts for servers you create!
+		WriteTimeout: 15 * time.Second,
+		ReadTimeout:  15 * time.Second,
+	}
+
+	log.Fatal(srv.ListenAndServe())
+}
+
+func HomeHandler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprint(w, "Hello world")
+}
+
+func TimeHandler(w http.ResponseWriter, r *http.Request) {
+	now := time.Now()
+	res := now.GoString()
+	fmt.Fprint(w, res)
+}