Add LVGMC warning map workflow

README.md

@@ -5,6 +5,12 @@ Tool for downloading historical and real-time data from weather stations in Latv
 ## Setup
 Rename `.env-sample` to `.env` and fill in credentials
 
+## Environment boundary
+
+- **Windows:** source editing, review, and Git operations only. Do not compile, build, run containers, install project dependencies, or test the application here.
+- **Rocky Linux:** the only development runtime; compile, build, run, seed, and test WeatherTool here.
+- **Ubuntu VPS:** deployment target only. It receives the reviewed release artifact built and verified on Rocky; it is not a development or build host.
+
 ## Run
 ```
 docker-compose up --build --no-cache --force-recreate
@@ -40,7 +46,7 @@ server {
 }
 ```
 
-## Local development
+## Rocky development runtime
 ```
 // 1st terminal
 podman-compose up postgres