add dbgate and mssql

SUMMARY.md

@@ -1,6 +1,6 @@
 # SilverLinux Infrastructure Summary
 
-Last Updated: 2026-06-21
+Last Updated: 2026-06-22
 
 ## Overview
 
@@ -19,6 +19,7 @@ The platform hosts source control, project management, video conferencing, conta
 | Portainer   | https://portainer.silveressence.net |
 | Jitsi Meet  | https://meet.silveressence.net      |
 | BaGet       | https://nuget.silveressence.net     |
+| DbGate      | https://dbgate.silveressence.net    |
 
 ---
 
@@ -91,6 +92,24 @@ Purpose:
 
 ---
 
+### Microsoft SQL Server Express
+
+Purpose:
+
+* Support projects requiring Microsoft SQL Server
+* Provide a private SQL Server 2022 Express platform
+
+Access:
+
+* Docker `internal` network only
+* Port 1433 is not publicly exposed
+
+Status:
+
+* Operational
+
+---
+
 ### Portainer
 
 Purpose:
@@ -139,6 +158,24 @@ Status:
 
 ---
 
+### DbGate
+
+Purpose:
+
+* Browser-based MSSQL and PostgreSQL administration
+
+Access:
+
+* https://dbgate.silveressence.net
+* HTTPS through Nginx Proxy Manager
+* Username and password required
+
+Status:
+
+* Operational
+
+---
+
 ## Shared Infrastructure
 
 ### Docker
@@ -166,7 +203,9 @@ Contains:
 
 * SMTP credentials
 * PostgreSQL passwords
+* MSSQL SA password
 * OpenProject secrets
+* Future DbGate password
 * Future OAuth secrets
 
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