config 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

tests/config.js

@@ -0,0 +1,35 @@
+var config = require('../config')
+
+const not_valid = (message) => {
+    console.log('not valid: ', message)
+}
+
+const test_config = () => {
+    var config_pass = true
+
+    if (!config) {
+        not_valid('config')
+        config_pass = false
+    }
+
+    if (!config.port) {
+        not_valid('port')
+        config_pass = false
+    }
+
+    if (!config.database_url) {
+        not_valid('database_url')
+        config_pass = false
+    }
+
+    if (!config.database_name) {
+        not_valid('database_name')
+        config_pass = false
+    }
+
+    return config_pass
+}
+
+module.exports = {
+    test_config
+}