Add Flask REST API test server for External System Gateway and Inbound API testing

test_infra.md

@@ -1,6 +1,6 @@
 # Test Infrastructure
 
-This document describes the local Docker-based test infrastructure for ScadaLink development. Four services provide the external dependencies needed to run and test the system locally.
+This document describes the local Docker-based test infrastructure for ScadaLink development. Five services provide the external dependencies needed to run and test the system locally.
 
 ## Services
 
@@ -10,6 +10,7 @@ This document describes the local Docker-based test infrastructure for ScadaLink
 | LDAP Server | `glauth/glauth:latest` | 3893 | `infra/glauth/config.toml` |
 | MS SQL 2022 | `mcr.microsoft.com/mssql/server:2022-latest` | 1433 | `infra/mssql/setup.sql` |
 | SMTP (Mailpit) | `axllent/mailpit:latest` | 1025 (SMTP), 8025 (web) | Environment vars |
+| REST API (Flask) | Custom build (`infra/restapi/Dockerfile`) | 5200 | `infra/restapi/app.py` |
 
 ## Quick Start
 
@@ -34,6 +35,7 @@ Each service has a dedicated document with configuration details, verification s
 - [test_infra_ldap.md](test_infra_ldap.md) — LDAP test server (GLAuth)
 - [test_infra_db.md](test_infra_db.md) — MS SQL 2022 database
 - [test_infra_smtp.md](test_infra_smtp.md) — SMTP test server (Mailpit)
+- [test_infra_restapi.md](test_infra_restapi.md) — REST API test server (Flask)
 
 ## Connection Strings
 
@@ -60,6 +62,13 @@ For use in `appsettings.Development.json`:
     "AuthMode": "None",
     "FromAddress": "scada-notifications@company.com",
     "ConnectionTimeout": 30
+  },
+  "ExternalSystems": {
+    "TestApi": {
+      "BaseUrl": "http://localhost:5200",
+      "AuthMode": "ApiKey",
+      "ApiKey": "scadalink-test-key-1"
+    }
   }
 }
 ```
@@ -69,7 +78,7 @@ For use in `appsettings.Development.json`:
 ```bash
 cd infra
 docker compose down            # stop containers, preserve SQL data volume
-docker compose stop opcua      # stop a single service (also: ldap, mssql, smtp)
+docker compose stop opcua      # stop a single service (also: ldap, mssql, smtp, restapi)
 ```
 
 **Full teardown** (removes volumes, optionally images and venv):
@@ -86,11 +95,13 @@ After a full teardown, the next `docker compose up -d` starts fresh — re-run t
 
 ```
 infra/
-  docker-compose.yml          # All four services
+  docker-compose.yml          # All five services
   teardown.sh                 # Teardown script (volumes, images, venv)
   glauth/config.toml          # LDAP users and groups
   mssql/setup.sql             # Database and user creation
   opcua/nodes.json            # Custom OPC UA tag definitions
-  tools/                      # Python CLI tools (opcua, ldap, mssql, smtp)
+  restapi/app.py              # Flask REST API server
+  restapi/Dockerfile          # REST API container build
+  tools/                      # Python CLI tools (opcua, ldap, mssql, smtp, restapi)
   README.md                   # Quick-start for the infra folder
 ```