ignore app.json and use app.json.example for repo

.gitignore

@@ -1,4 +1,5 @@
 .DS_Store
+app.json
 */**/.DS_Store
 node_modules
 npm-debug.log

app.json.example

@@ -0,0 +1,23 @@
+[
+  {
+    "name"              : "node-app",
+    "script"            : "app.js",
+    "log_date_format"   : "YYYY-MM-DD HH:mm Z",
+    "merge_logs"        : false,
+    "watch"             : false,
+    "max_restarts"      : 10,
+    "exec_interpreter"  : "node",
+    "exec_mode"         : "fork_mode",
+    "env":
+    {
+      "NODE_ENV"        : "production",
+      "RPC_HOST"        : "localhost",
+      "RPC_PORT"        : "8545",
+      "LISTENING_PORT"  : "30303",
+      "INSTANCE_NAME"   : "",
+      "CONTACT_DETAILS" : "",
+      "WS_SERVER"       : "wss://stats.ethdev.com",
+      "WS_SECRET"       : "see http://forum.ethereum.org/discussion/2112/how-to-add-yourself-to-the-stats-dashboard-its-not-automatic",
+    }
+  }
+]