config tests added,

titles tests added,
.env file support added with dotenv,
README.md file updated for .evn file support,
database lost connection bug crash fixed,
session server run_session long timeout bug fixed,
links module added,
webrtc_proc json arguments added,
app_proc stdout and stderr support added,
infinity app_proc spawn freeze bug fixed

tests/titles.js

@@ -0,0 +1,24 @@
+const fs = require('fs')
+
+const titles = require('../titles')
+
+const path_not_exists = (message) => {
+    console.error('path not exists (titles.json): \n', message)
+}
+
+const test_titles = () => {
+    var titles_pass = true
+
+    titles.forEach(title => {
+        if (!fs.existsSync(title.path)) {
+            titles_pass = false
+            path_not_exists(`\ttitle: ${title.title}, path: ${title.path}`)
+        }
+    })
+
+    return titles_pass
+}
+
+module.exports = {
+    test_titles
+}