Built on Travis instead of Dockerhub.

.travis.yml

@@ -23,3 +23,4 @@ script:
 
 after_script:
    - docker-compose down
+   - sh .travis/deploy_dockerhub.sh

.travis/deploy_dockerhub.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+docker login -e $DOCKER_EMAIL -u $DOCKER_USER -p $DOCKER_PASS
+docker push maxking/mailman-web
+docker push maxking/mailman-core

build.sh

@@ -4,8 +4,13 @@ set -e
 
 # Use this script to build docker images.
 
+if [ "$TRAVIS_BRANCH" = "master" ]; then
+    TAG="latest"
+else
+    TAG="$TRAVIS_BRANCH"
+fi
+
 DOCKER=docker
 
-
-$DOCKER build -t maxking/mailman-core core/
-$DOCKER build -t maxking/mailman-web web/
+$DOCKER build -t maxking/mailman-core:$TAG core/
+$DOCKER build -t maxking/mailman-web:$TAG web/