add envsample and loading dep

.envsample

@@ -0,0 +1,2 @@
+SLACK_API_TOKEN=???
+SLACK_CHANNEL=???

.gitignore

@@ -1 +1,2 @@
 node_modules
+.env

index.js

@@ -1,3 +1,5 @@
+require('dotenv').load();
+
 const assert = require("assert");
 const bole = require("bole"); 
 const logstring = require("common-log-string");

package.json

@@ -17,7 +17,9 @@
     "bole": "^2.0.0",
     "common-log-string": "^0.2.1"
   },
-  "devDependencies": {},
+  "devDependencies": {
+    "dotenv": "^2.0.0"
+  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/npm/slack-hook-subscribe.git"