try to build minimal image

aux/Dockerfile-release

@@ -0,0 +1,12 @@
+FROM golang as builder
+WORKDIR /app/dtm
+RUN go env -w GO111MODULE=on
+RUN go env -w GOPROXY=https://mirrors.aliyun.com/goproxy/,direct
+EXPOSE 8080
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags "-s -w" app/main.go
+
+FROM scratch as runner
+COPY --from=builder /app/dtm/main /app/dtm/main
+ENV IS_DOCKER=1
+CMD ["/app/dtm/main", "dtmsvr"]

compose.mysql.yml

@@ -1,15 +0,0 @@
-version: '3.3'
-services:
-  mysql:
-    image: 'mysql:5.7'
-    environment:
-      MYSQL_ALLOW_EMPTY_PASSWORD: 1
-      TZ: Asia/shanghai
-    command:
-      [
-        '--character-set-server=utf8mb4',
-        '--collation-server=utf8mb4_unicode_ci',
-        '--default-time-zone=+8:00',
-      ]
-    ports:
-      - '3306:3306'

compose.yml

@@ -3,7 +3,7 @@ services:
   api:
     build: .
     environment:
-      IS_DOCKER_COMPOSE: '1'
+      IS_DOCKER: '1'
     ports:
       - '8080:8080'
     volumes:

dtmcli/utils.go

@@ -174,7 +174,7 @@ func GetFuncName() string {
 
 // MayReplaceLocalhost when run in docker compose, change localhost to host.docker.internal for accessing host network
 func MayReplaceLocalhost(host string) string {
-	if os.Getenv("IS_DOCKER_COMPOSE") != "" {
+	if os.Getenv("IS_DOCKER") != "" {
 		return strings.Replace(host, "localhost", "host.docker.internal", 1)
 	}
 	return host

dtmcli/utils_test.go

@@ -70,10 +70,10 @@ func TestSome(t *testing.T) {
 	func1 := GetFuncName()
 	assert.Equal(t, true, strings.HasSuffix(func1, "TestSome"))
 
-	os.Setenv("IS_DOCKER_COMPOSE", "1")
+	os.Setenv("IS_DOCKER", "1")
 	s := MayReplaceLocalhost("http://localhost")
 	assert.Equal(t, "http://host.docker.internal", s)
-	os.Setenv("IS_DOCKER_COMPOSE", "")
+	os.Setenv("IS_DOCKER", "")
 	s2 := MayReplaceLocalhost("http://localhost")
 	assert.Equal(t, "http://localhost", s2)
 }