diff --git a/.dockerignore b/.dockerignore
index 4207a951..7ca01557 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -2,4 +2,5 @@
 logs
 *.log
 dist/
-**/node_modules/
\ No newline at end of file
+**/node_modules/
+**/tmp/
diff --git a/backend/services/git.go b/backend/services/git.go
index f1d42f23..1bb8b3b9 100644
--- a/backend/services/git.go
+++ b/backend/services/git.go
@@ -312,12 +312,9 @@ func GetGitSshPublicKey() string {
 	if !utils.Exists(path.Join(os.Getenv("HOME"), ".ssh")) ||
 		!utils.Exists(path.Join(os.Getenv("HOME"), ".ssh", "id_rsa")) ||
 		!utils.Exists(path.Join(os.Getenv("HOME"), ".ssh", "id_rsa.pub")) {
-		cmd := exec.Command(fmt.Sprintf("ssh-keygen -q -t rsa -N \"\" -f %s/.ssh/id_rsa", os.Getenv("HOME")))
-		if err := cmd.Start(); err != nil {
-			log.Errorf(err.Error())
-			debug.PrintStack()
-			return ""
-		}
+		log.Errorf("no ssh public key")
+		debug.PrintStack()
+		return ""
 	}
 	content, err := ioutil.ReadFile(path.Join(os.Getenv("HOME"), ".ssh", "id_rsa.pub"))
 	if err != nil {
diff --git a/docker_init.sh b/docker_init.sh
index 6f139c92..b65188b4 100755
--- a/docker_init.sh
+++ b/docker_init.sh
@@ -29,5 +29,8 @@ then
 	/bin/sh /app/backend/scripts/install-nodejs.sh
 fi
 
+# generate ssh
+ssh-keygen -q -t rsa -N "" -f ${HOME}/.ssh/id_rsa
+
 # start backend
 crawlab
\ No newline at end of file