Build scripts refactoring (#33)

* Build scripts refactoring

`.github/build-and-upload.sh` to use `build.sh`
Related to  #32

* Update build.sh

Following review comments

.github/build-and-upload.sh

@@ -1,20 +1,12 @@
 #!/bin/bash
 
-echo "Cloning graphhopper"
-git clone https://github.com/graphhopper/graphhopper.git
-echo "Building docker image"
-docker build . -t israelhikingmap/graphhopper:latest
-docker login --username $DOCKERHUB_USER --password $DOCKERHUB_TOKEN
-echo "Publishing docker image"
-docker push israelhikingmap/graphhopper:latest
+echo "Buidling and pushing israelhikingmap/graphhopper:latest"
+./build.sh --push
 
-TAG=`cd graphhopper; git for-each-ref --sort=committerdate refs/tags | tail -n 1 | cut -d "/" -f3`
-if docker manifest inspect israelhikingmap/graphhopper:$TAG >/dev/null; then 
-    echo "No need to publish existing version: $TAG";
+TAG=`cd graphhopper; git for-each-ref --sort=committerdate refs/tags | sed -n '$s/.*\///p'`
+if docker manifest inspect "israelhikingmap/graphhopper:${TAG}" >/dev/null; then 
+    echo "No need to push existing version: ${TAG}";
 else
-    (cd graphhopper ; git checkout tags/$TAG)
-    echo "Building docker image for tag: $TAG"
-    docker build . -t israelhikingmap/graphhopper:$TAG
-    echo "Publishing docker image for tag: $TAG"
-    docker push israelhikingmap/graphhopper:$TAG
+    echo "Buidling and pushing israelhikingmap/graphhopper:${TAG}"
+    ./build.sh --push "${TAG}"
 fi