diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..d6ef6d6
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,12 @@
+FROM golang:1-alpine as builder
+WORKDIR /data
+COPY . .
+RUN apk add --no-cache build-base make && \
+  make test && \
+  make
+
+FROM alpine:latest
+WORKDIR /data
+COPY ./config/config.yml .
+COPY --from=builder /data/tcp-proxy /usr/bin/tcp-proxy
+CMD ["/usr/bin/tcp-proxy"]
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..ef4a538
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,11 @@
+.PHONY: all
+all: clean build
+
+build:
+	go build -o tcp-proxy -ldflags "-w -s" .
+
+clean:
+	go clean && rm -rf tcp-proxy
+
+test:
+	go test -v ./...
diff --git a/go.sum b/go.sum
index e61e2ad..5c33063 100644
--- a/go.sum
+++ b/go.sum
@@ -12,6 +12,7 @@ github.com/otakukaze/envconfig v1.0.0 h1:VGu7NoDFbReFO72m5Z15h5PH5gVk5fVLZ6iHF58
 github.com/otakukaze/envconfig v1.0.0/go.mod h1:v2dNv5NX1Lakw3FTAkbxYURyaiOy68M8QpMTZz+ogfs=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 h1:DH4skfRX4EBpamg7iV4ZlCpblAHI6s6TDM39bFZumv8=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
 gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/pkg/common/common_test.go b/pkg/common/common_test.go
index a5750d1..fe88fe6 100644
--- a/pkg/common/common_test.go
+++ b/pkg/common/common_test.go
@@ -1,8 +1,11 @@
 package common
 
-import "testing"
+import (
+	"testing"
+)
 
 func TestCheckRemoteSSH(t *testing.T) {
+
 	type args struct {
 		host    string
 		port    int
@@ -14,10 +17,10 @@ func TestCheckRemoteSSH(t *testing.T) {
 		want error
 	}{
 		{
-			name: "test check localhost ssh port",
+			name: "test check google web port",
 			args: args{
-				host:    "localhost",
-				port:    22,
+				host:    "google.com",
+				port:    80,
 				timeout: 5,
 			},
 			want: nil,
@@ -31,3 +34,27 @@ func TestCheckRemoteSSH(t *testing.T) {
 		})
 	}
 }
+
+func TestCheckDomain(t *testing.T) {
+	type args struct {
+		name string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{
+			name:    "test domain check",
+			args:    args{name: "trj.tw"},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := CheckDomain(tt.args.name); (err != nil) != tt.wantErr {
+				t.Errorf("CheckDomain() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}