Change build script to build latest release versions if not in CI (#115)

Build.sh can build the latest versions of the images using the VERSION file under the two repos (core & web).

.travis/deploy_dockerhub.sh

@@ -1,4 +1,10 @@
 #!/bin/sh
-docker login -e $DOCKER_EMAIL -u $DOCKER_USER -p $DOCKER_PASS
-docker push maxking/mailman-web
-docker push maxking/mailman-core
+
+if [[ "$TRAVIS_BRANCH" == "master" ]]
+then
+	docker login -e $DOCKER_EMAIL -u $DOCKER_USER -p $DOCKER_PASS
+	docker push maxking/mailman-web
+	docker push maxking/mailman-core
+else
+	echo "Non-master branch aren't pushed to DockerHub..."
+fi

build.sh

@@ -4,13 +4,21 @@ set -e
 
 # Use this script to build docker images.
 
-if [ "$TRAVIS_BRANCH" = "master" ]; then
-    TAG="latest"
+if [[ "$TRAVIS" ]]
+then
+	if [ "$TRAVIS_BRANCH" = "master" ]; then
+		CORE_TAG="latest"
+		WEB_TAG="latest"
+	else
+		CORE_TAG="$TRAVIS_BRANCH"
+		WEB_TAG="$TRAVIS_BRANCH"
+	fi
 else
-    TAG="$TRAVIS_BRANCH"
+    CORE_TAG=`cat core/VERSION`
+    WEB_TAG=`cat web/VERSION`
 fi
 
 DOCKER=docker
 
-$DOCKER build -t maxking/mailman-core:$TAG core/
-$DOCKER build -t maxking/mailman-web:$TAG web/
+$DOCKER build -t maxking/mailman-core:$CORE_TAG core/
+$DOCKER build -t maxking/mailman-web:$WEB_TAG web/

core/VERSION

@@ -0,0 +1 @@
+0.1.1

web/VERSION

@@ -0,0 +1 @@
+0.1.1