diff --git a/.travis.yml b/.travis.yml
index 59040c3..c68f69a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,6 @@
+sudo: required
+services:
+  - docker
 language: go
 go:
   - "1.10"
@@ -10,3 +13,7 @@ deploy:
     on:
       tags: true
       condition: $TRAVIS_OS_NAME = linux
+  - provider: script
+    script: bash docker/docker_push
+    on:
+      branch: master
diff --git a/README.md b/README.md
index 89fe1c1..a93429b 100644
--- a/README.md
+++ b/README.md
@@ -84,7 +84,7 @@ Share current directory with http basic auth
 
 ```bash
 docker run -it --rm -p 8000:8000 -v $PWD:/app/public --name gohttpserver \
-  codeskyblue/gohttpserver --root /app/public \
+  codeskyblue/gohttpserver \
   --auth-type http --auth-http username:password
 ```
 
@@ -92,7 +92,7 @@ Share current directory with openid auth. (Works only in netease company.)
 
 ```bash
 docker run -it --rm -p 8000:8000 -v $PWD:/app/public --name gohttpserver \
-  codeskyblue/gohttpserver --root /app/public \
+  codeskyblue/gohttpserver \
   --auth-type openid
 ```
 
diff --git a/Dockerfile b/docker/Dockerfile
similarity index 87%
rename from Dockerfile
rename to docker/Dockerfile
index e3d579f..f0d8556 100644
--- a/Dockerfile
+++ b/docker/Dockerfile
@@ -12,5 +12,5 @@ VOLUME /app/public
 ADD assets ./assets
 COPY --from=0 /go/src/github.com/codeskyblue/gohttpserver/gohttpserver .
 EXPOSE 8000
-ENTRYPOINT [ "/app/gohttpserver" ]
-CMD ["--root=/app/public"]
+ENTRYPOINT [ "/app/gohttpserver", "--root=/app/public" ]
+CMD []
diff --git a/docker/Dockerfile.armhf b/docker/Dockerfile.armhf
new file mode 100644
index 0000000..e6f435b
--- /dev/null
+++ b/docker/Dockerfile.armhf
@@ -0,0 +1,16 @@
+FROM golang:1.10
+WORKDIR /go/src/github.com/codeskyblue/gohttpserver
+ADD . /go/src/github.com/codeskyblue/gohttpserver/
+RUN go get -v
+RUN GOOS=linux GOARCH=arm go build -o gohttpserver .
+
+FROM multiarch/debian-debootstrap:armhf-stretch
+WORKDIR /app
+RUN mkdir -p /app/public
+RUN apt-get update && apt-get install -y ca-certificates
+VOLUME /app/public
+ADD assets ./assets
+COPY --from=0 /go/src/github.com/codeskyblue/gohttpserver/gohttpserver .
+EXPOSE 8000
+ENTRYPOINT [ "/app/gohttpserver", "--root=/app/public" ]
+CMD []
diff --git a/docker/docker_push b/docker/docker_push
new file mode 100644
index 0000000..78ec9de
--- /dev/null
+++ b/docker/docker_push
@@ -0,0 +1,17 @@
+#!/bin/bash
+#
+# article: https://lantian.pub/article/modify-computer/build-arm-docker-image-on-x86-docker-hub-travis-automatic-build.lantian
+
+set -ex
+
+docker run --rm --privileged multiarch/qemu-user-static:register --reset
+echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
+
+IMAGE_NAME="gohttpserver"
+
+# arm linux for respberry
+docker build -t $DOCKER_USERNAME/$IMAGE_NAME:armhf -f Dockerfile.armhf docker
+
+# x86 linux
+docker build -t $DOCKER_USERNAME/$IMAGE_NAME -f Dockerfile docker
+docker push $DOCKER_USERNAME/$IMAGE_NAME