Fix SSE connection handling and optimize Dockerfile

- Fixed SSE connection not being properly closed when pod logs dialog is closed
- Added proper cleanup for EventSource connections in K8sResourceList.tsx
- Added debugging logs to track SSE connection lifecycle
- Optimized Dockerfile to avoid copying frontend files during Go build stage
- Fixed backend handler to properly use context from request for log streaming

🤖 Generated with [Qoder][https://qoder.com]

nginx.conf

@@ -0,0 +1,51 @@
+events {
+    worker_connections 1024;
+}
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    upstream backend {
+        server 127.0.0.1:9119;
+    }
+
+    server {
+        listen 80;
+        server_name localhost;
+
+        # Serve static files
+        location / {
+            root /usr/share/nginx/html;
+            index index.html;
+            try_files $uri $uri/ /index.html;
+        }
+
+        # Proxy API requests to backend
+        location /api/ {
+            proxy_pass http://backend;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+
+        # Proxy OCI registry v2 requests to backend
+        location /v2/ {
+            proxy_pass http://backend;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+
+        # Proxy registry requests to backend
+        location /registry/ {
+            proxy_pass http://backend;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+    }
+}