fix(docker): switch Grafana to root serving with nginx path stripping

docker/nginx.conf

@@ -79,8 +79,8 @@ http {
         }
 
         location /grafana/ {
-            # Do NOT strip the path. explicit serve_from_sub_path=true in Grafana needs the prefix.
-            proxy_pass http://127.0.0.1:3000;
+            # Strip the path. Grafana will be configured with serve_from_sub_path=false
+            proxy_pass http://127.0.0.1:3000/;
             proxy_set_header Host $host;
             proxy_set_header X-Real-IP $remote_addr;
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

docker/scripts/start_space.sh

@@ -102,7 +102,7 @@ grafana-server --homepath=/usr/share/grafana \
     cfg:default.paths.logs=/tmp/grafana_logs \
     cfg:default.paths.plugins=/usr/share/grafana/plugins \
     cfg:server.root_url="$GRAFANA_ROOT_URL" \
-    cfg:server.serve_from_sub_path=true \
+    cfg:server.serve_from_sub_path=false \
     >> /tmp/grafana.log 2>&1 &
 
 # Wait for Grafana to start
@@ -110,6 +110,9 @@ echo "$(date) - Waiting for Grafana (20s)..."
 for i in {1..20}; do
     if curl -s http://127.0.0.1:3000/api/health > /dev/null; then
         echo "$(date) - Grafana is UP!"
+        # Debug: Check what Grafana responds at root
+        echo "$(date) - VERIFYING GRAFANA ROOT RESPONSE:"
+        curl -v http://127.0.0.1:3000/ 2>&1 | head -n 20
         break
     fi
     sleep 1