Improve Travis deployment process

.travis.yml

@@ -3,7 +3,8 @@ sudo: required
 env:
     global:
         - TAG_PATTERN="^[0-9]+(\.[0-9]+){2}(-(alpha|beta|rc))?$"
-        - DOCKER_IMAGE=eexit/mirror-http-server:${TRAVIS_TAG:=$TRAVIS_BUILD_NUMBER}
+        - DOCKER_IMAGE=eexit/mirror-http-server
+        - DOCKER_TAG=${TRAVIS_TAG:=$TRAVIS_BUILD_NUMBER}
 
 services:
     - docker
@@ -12,10 +13,10 @@ before_install:
     - docker login --email=$DOCKER_EMAIL --username=$DOCKER_USER --password=$DOCKER_PASSWD
 
 install:
-    - docker build -t $DOCKER_IMAGE .
+    - docker build -t $DOCKER_IMAGE:$DOCKER_TAG .
 
 script:
-    - docker run $DOCKER_IMAGE npm test
+    - docker run $DOCKER_IMAGE:$DOCKER_TAG npm test
 
 after_success:
-    - if [[ "$TRAVIS_TAG" =~ $TAG_PATTERN ]]; then docker push $DOCKER_IMAGE; fi
+    - $(pwd)/docker-push

docker-push

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -e
+
+if [[ "$TRAVIS_TAG" =~ $TAG_PATTERN ]]; then
+    echo "Pushing $DOCKER_IMAGE:$DOCKER_TAG"
+    docker push $DOCKER_IMAGE:$DOCKER_TAG;
+
+    echo "Tagging $DOCKER_IMAGE:$DOCKER_TAG as $DOCKER_IMAGE:latest"
+    docker tag $DOCKER_IMAGE:$DOCKER_TAG $DOCKER_IMAGE:latest
+
+    echo "Pushing $DOCKER_IMAGE:latest"
+    docker push $DOCKER_IMAGE:latest
+fi