delete tool directory since it has no tools in it and add release.sh script

release.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+set -ex
+
+user="iron"
+service="functions"
+version_file="api/server/version.go"
+tag="latest"
+
+if [ -z $(grep -m1 -Eo "[0-9]+\.[0-9]+\.[0-9]+" $version_file) ]; then
+  echo "did not find semantic version in $version_file"
+  exit 1
+fi
+
+perl -i -pe 's/\d+\.\d+\.\K(\d+)/$1+1/e' $version_file
+version=$(grep -m1 -Eo "[0-9]+\.[0-9]+\.[0-9]+" $version_file)
+echo "Version: $version"
+
+./scripts/build-docker.sh
+
+git add -u
+git commit -m "$service: $version release"
+git tag -a "$version" -m "version $version"
+git push
+git push --tags
+
+# Finally tag and push docker images
+docker tag $user/$service:$tag $user/$service:$version
+
+docker push $user/$service:$version
+docker push $user/$service:$tag