package: docker image now includes actual version

Also fix several typos

Makefile

@@ -1,5 +1,5 @@
 NS = rancher
-VERSION ?= latest
+VERSION = $(shell ./scripts/version)
 
 REPO = longhorn-ui
 NAME = longhorn-ui
@@ -11,6 +11,7 @@ PORT = 8000
 
 build:
 	docker build -t $(NS)/$(REPO):$(VERSION) .
+	@echo Build $(NS)/$(REPO):$(VERSION) successful
 
 stop:
 	docker stop $(NAME)-$(INSTANCE)

README.md

@@ -11,8 +11,8 @@ Prerequisites:
 
 Setup:
 ```bash
-  git clone 'https://github.com/rancher/longhron-ui'
-  cd 'longhron-ui'
+  git clone 'https://github.com/rancher/longhorn-ui'
+  cd 'longhorn-ui'
   npm install
 ```
 Run development server pointed at some Longhron Manger API

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "longhron",
+  "name": "longhorn",
   "version": "0.0.1",
   "private": true,
   "scripts": {

scripts/version

@@ -0,0 +1,17 @@
+#!/bin/bash
+set -e
+
+if [ -n "$(git status --porcelain --untracked-files=no)" ]; then
+    DIRTY="-dirty"
+fi
+
+COMMIT=$(git rev-parse --short HEAD)
+GIT_TAG=$(git tag -l --contains HEAD | head -n 1)
+
+if [[ -z "$DIRTY" && -n "$GIT_TAG" ]]; then
+    VER=$GIT_TAG
+else
+    VER="${COMMIT}${DIRTY}"
+fi
+
+echo ${VER}