feat(source2): push all latest files - device labeling, help system, proxy docs, database isolation fix

- Added DOKUMENTASI-FILTER-PER-SITE.md (site isolation docs)
- Fixed start-with-env.js to force-load .env.production
- Fixed MONGODB_URI hostname from mongodb-netify to mongodb.prod.proit.id
- Updated .gitignore to exclude sensitive scripts and credential files
- Minor UI and labeling improvements

backend/check_server.js

@@ -0,0 +1,31 @@
+const { Client } = require('ssh2');
+const conn = new Client();
+
+conn.on('ready', () => {
+  const cmd = [
+    'export PM2=/home/adminbackend/.npm-global/bin/pm2',
+    '$PM2 list',
+    'echo "=== MEMORY ==="',
+    'free -m',
+    'echo "=== DISK ==="',
+    'df -h /',
+    'echo "=== FRONTEND LOGS ==="',
+    '$PM2 logs backone-frontend --lines 20 --nostream 2>&1',
+    'echo "=== BACKEND LOGS ==="',
+    '$PM2 logs backone-backend --lines 10 --nostream 2>&1',
+  ].join(' && ');
+
+  conn.exec(cmd, (err, stream) => {
+    if (err) { console.error(err); conn.end(); return; }
+    stream.on('data', d => process.stdout.write(d.toString()));
+    stream.stderr.on('data', d => process.stderr.write(d.toString()));
+    stream.on('close', () => conn.end());
+  });
+}).connect({
+  host: '103.185.47.52',
+  port: 2222,
+  username: 'adminbackend',
+  password: 'htEo7x6LsBQiEHHH',
+});
+
+conn.on('error', e => console.error('SSH Error:', e.message));