Fixes issue with template not found

package.json

@@ -1,6 +1,6 @@
 {
   "name": "revoice",
-  "version": "0.1.11",
+  "version": "0.1.12",
   "description": "Generate HTML / PDF receipts and invoices",
   "main": "dist/index.js",
   "homepage": "https://github.com/brewhk/revoice",
@@ -47,6 +47,7 @@
   },
   "dependencies": {
     "ajv": "^5.2.2",
+    "app-root-path": "^2.0.1",
     "crypto-js": "^3.1.9-1",
     "currency-formatter": "^1.2.1",
     "handlebars": "^4.0.10",

src/index.js

@@ -13,6 +13,8 @@ import ItemSchema from './schema/item.json';
 
 import * as errorStrings from './errors.js';
 
+import appRoot from 'app-root-path';
+
 const Revoice = {};
 
 Revoice.DEFAULT_TEMPLATE = 'default';
@@ -28,13 +30,13 @@ Revoice.DEFAULT_OPTIONS = {
  * Get the URL of the template HTML
  */
 Revoice.getTemplateUrl = function getTemplateUrl(template) {
-  if (!template) return `./templates/${Revoice.DEFAULT_TEMPLATE}.html`;
+  if (!template) return `${appRoot}/templates/${Revoice.DEFAULT_TEMPLATE}.html`;
   // If the template is a alphanumeric string,
   // we assume it's using a pre-defined template
   // and we return the path to it
   // Otherwise, we treat it as a user-provided path,
   // and simply return that
-  return /^[a-zA-Z0-9]+$/.test(template) ? `./templates/${template}.html` : template;
+  return /^[a-zA-Z0-9]+$/.test(template) ? `${appRoot}/templates/${template}.html` : template;
 }
 
 Revoice.getTemplate = function (template = Revoice.DEFAULT_TEMPLATE) {

yarn.lock

@@ -61,6 +61,10 @@ anymatch@^1.3.0:
     micromatch "^2.1.5"
     normalize-path "^2.0.0"
 
+app-root-path@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/app-root-path/-/app-root-path-2.0.1.tgz#cd62dcf8e4fd5a417efc664d2e5b10653c651b46"
+
 append-transform@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/append-transform/-/append-transform-0.4.0.tgz#d76ebf8ca94d276e247a36bad44a4b74ab611991"