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

src/modules/run_process.js

@@ -10,7 +10,7 @@ const is_proc_running = (pid) => {
     return is_running(pid)
 }
 
-const is_proc_running_async = async (pid, check_time) => {
+const is_proc_running_async = async (pid, time_ms) => {
     var timeout_count = 0
     var check_times = 10
 
@@ -22,7 +22,7 @@ const is_proc_running_async = async (pid, check_time) => {
         if (timeout_count > check_times) {
             return true
         }
-        await new Promise(resolve => setTimeout(resolve, check_time / check_times))
+        await new Promise(resolve => setTimeout(resolve, time_ms / check_times))
     }
 }
 
@@ -33,7 +33,8 @@ const run_webrtc = async (webrtc_port, app_port) => {
 
     var webrtc_proc
     try {
-        webrtc_proc = fork(webrtc_server_path, [webrtc_port.toString(), app_port.toString()], {
+        var webrtc_proc_arg = JSON.stringify({webrtc_port:webrtc_port, app_port:app_port})
+        webrtc_proc = fork(webrtc_server_path, [webrtc_proc_arg], {
             detached: true
         })
     } catch (err) {
@@ -49,9 +50,18 @@ const run_app = async (app_path, app_port) => {
     var app_proc
     try {
         app_proc = spawn(app_path, [].concat(app_args_static, 
-            [app_port_arg + app_port.toString()]), {
+            [app_port_arg + app_port.toString()], { cwd: './', stdio: ['ignore', 'pipe', 'pipe']}), {
                 detached: true
             })
+        
+        // bind some events to unfreez process
+        app_proc.stdout.on('data', data => {
+            //console.log('stdout: ' + data.toString());
+        })
+    
+        app_proc.stderr.on('data', data => {
+            //console.log('stderr: ' + data.toString());
+        })
     } catch (err) {
         return null
     }