fix: inject GwUrl into appsettings at container startup

The blazor-environment header is stripped by the Blazor WASM service
worker cache, causing Blazor to fall back to Production environment
and load appsettings.Production.json (GwUrl=https://cms.kbs1.ir).

Fix: use sed in docker-entrypoint.sh to replace GwUrl in ALL
appsettings*.json files at container startup with the GW_URL env var.
Default GW_URL=https://cms.se.kbs1.ir for staging deployment.

src/BackOffice/Dockerfile

@@ -31,6 +31,8 @@ RUN chmod +x /docker-entrypoint.sh
 
 # Default Blazor environment (override via K8s env var BLAZOR_ENVIRONMENT)
 ENV BLAZOR_ENVIRONMENT=Staging
+# Default gateway URL for gRPC calls (injected into appsettings at startup)
+ENV GW_URL=https://cms.se.kbs1.ir
 
 EXPOSE 80
 CMD ["/docker-entrypoint.sh"]

src/BackOffice/docker-entrypoint.sh

@@ -15,4 +15,16 @@ server {
 }
 NGINX_CONF
 
+# Inject GW_URL into all appsettings JSON files
+# This overrides GwUrl regardless of which environment Blazor detects,
+# which is critical because the service worker cache strips the
+# blazor-environment header and Blazor falls back to Production.
+WWWROOT="/usr/share/nginx/html"
+if [ -n "$GW_URL" ]; then
+  echo "[entrypoint] Setting GwUrl to $GW_URL in all appsettings files"
+  for f in "$WWWROOT"/appsettings*.json; do
+    [ -f "$f" ] && sed -i "s|\"GwUrl\":\s*\"[^\"]*\"|\"GwUrl\": \"$GW_URL\"|g" "$f"
+  done
+fi
+
 exec nginx -g 'daemon off;'