add the simplest archiver possible.

js/babl/.gitignore

@@ -1 +1,3 @@
/node_modules
/msgs.json

js/babl/archiver.js

@@ -0,0 +1,17 @@
var fs = require('fs');
var WebSocket = require('ws');
var dbPath = process.env.DB_PATH || "msgs.json";
var msgs = [];
if (fs.existsSync(dbPath)) {
	msgs = JSON.parse(fs.readFileSync(dbPath));
}
var ws = new WebSocket(process.env.HOST_URL || "ws://localhost:8080");
ws.on('message', function(data) {
	msgs.push(JSON.parse(data));
	fs.writeFileSync(dbPath, JSON.stringify(msgs));
});