duplicate correct file

public/javascripts/index-localhost.js

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+// This is the default config (localhost). This file does nothing on its
+// own, and should not be modified. The index.js file is updated by sed
+// when the container is run.
+
+// Check for the various File API support.
+if (!(window.File && window.FileReader && window.FileList && window.Blob)) {
+  alert('This website requires HTML5, which your browser does not fully support. Please use a supported browser to use this website.');
+}
+
+// Grab a peer ID
+var peer = new Peer({host: 'localhost', port: 9000, path: '/node_modules/peerjs'});
+
+// Send a file
+function send() {
+    // Check that all fields are filled
+    var valid = true;
+    var file_to_send = document.getElementById("file_to_send").files[0];
+    var dest_id = document.getElementById("dest_id").value;
+    if(!file_to_send) {
+        valid = false;
+        alert("Please select a file.");
+    }
+    if(!dest_id) {
+        valid = false;
+        alert("Please provide a Destination ID.");
+    }
+    else if (dest_id === peer.id) {
+        valid = false;
+        alert("You can't send a file to yourself!");
+    }
+    if(!valid){
+        return;
+    }
+
+    // Build blob from file and file type
+    var blob = new Blob([file_to_send], {type: file_to_send.type});
+
+    // Connect to the desired peer
+    var con = peer.connect(dest_id, { label: 'file', reliable: true}); 
+
+    con.on('open', function() {
+        // Send arr of blob and file data
+        con.send({
+            name: document.getElementById("file_to_send").files[0].name,
+            file: blob,
+            type: document.getElementById("file_to_send").files[0].type
+        });
+    });
+}
+
+// Display ID
+peer.on('open', function(id) {
+  document.getElementById("my_id").textContent = peer.id;
+});
+
+// Constantly listen for incoming connections
+peer.on('connection', function(conn) {
+    conn.on('open', function() {
+        conn.on('data', function(data) {
+            var blob = new Blob([data.file], {type: data.type});
+            var url = window.URL.createObjectURL(blob);
+
+            var table = document.getElementById("file_table");
+
+            // Remove the "No Files" row
+            var elem = document.getElementById("empty_row");
+            if(elem) {
+                elem.parentNode.removeChild(elem);
+                //var row = table.insertRow(1);
+                //row.innerHTML = "File";
+                //var cell = row.insertCell(0);
+                //cell.innerHTML = "Time received";
+                //cell = row.insertCell(0);
+                //cell.innerHTML = "Source ID";
+                //cell = row.insertCell(0);
+                //cell.innerHTML = "Size";
+
+            }
+
+            var row = table.insertRow(1);
+            var a = document.createElement("a");
+            a.href = url;
+            a.innerHTML = data.name;
+            a.setAttribute("download", data.name);
+            var file_col = row.insertCell(0);
+            file_col.appendChild(a);
+            //int id_col = row.insertCell(0);
+            //var d = new Date();
+            //id_col.innerHTML = d.getHours+':'+d.getMinutes();
+        });
+    });
+});
+
+peer.on('error', function(err) {
+    if (err.type === 'peer-unavailable') {
+        alert("No user with the given ID is currently connected.");
+    }
+});