feat(#6): release versioning script

package.json

@@ -1,6 +1,5 @@
 {
   "name": "vivify-server",
-  "version": "0.0.1",
   "repository": "https://github.com/jannis-baum/vivify.git",
   "author": "Jannis Baum",
   "scripts": {

release.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+if [ "$1" != "minor" -a "$1" != "major" ]; then
+    echo "Specify increment minor|major."
+    exit 1
+fi
+
+version="v0.0.0"
+prev=$(git tag --sort=version:refname | tail -1)
+
+if [ -n "$prev" ]; then
+    prefix=$(cut -d. -f1 <<< $prev)
+    major=$(cut -d. -f2 <<< $prev)
+
+    [ "$1" = "minor" ] && minor=$(bc <<< "$(cut -d. -f3 <<< $prev) + 1")
+    [ "$1" = "major" ] && major=$(bc <<< "$major + 1") && minor="0"
+
+    version="$prefix.$major.$minor"
+fi
+
+git tag -s -a $version
+git push origin $version