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]

Dockerfile

@@ -0,0 +1,63 @@
+# Multi-stage build for Cluster application with Go backend and React frontend
+
+# Frontend build stage
+FROM node:18 AS frontend-build
+
+WORKDIR /app
+
+# Copy package files
+COPY frontend/package.json frontend/pnpm-lock.yaml ./
+
+# Install pnpm globally
+RUN npm install -g pnpm
+
+# Install frontend dependencies
+RUN pnpm install --frozen-lockfile
+
+# Copy frontend source
+COPY frontend/ .
+
+# Build frontend
+RUN pnpm run build
+
+# Backend build stage
+FROM golang:1.22 AS backend-build
+
+WORKDIR /app
+
+# Copy go mod files
+COPY go.mod go.sum ./
+
+# Download dependencies
+RUN go mod download
+
+# Copy only backend source code
+COPY main.go ./
+COPY internal/ ./internal/
+COPY pkg/ ./pkg/
+
+# Build backend
+RUN go build -o cluster .
+
+# Final stage - Nginx server
+FROM nginx:latest
+
+# Copy nginx configuration
+COPY nginx.conf /etc/nginx/nginx.conf
+
+# Copy backend binary
+COPY --from=backend-build /app/cluster /app/cluster
+
+# Copy frontend build
+COPY --from=frontend-build /app/dist /usr/share/nginx/html
+
+# Create data directory
+RUN mkdir -p /app/x-storage
+
+# Expose ports
+EXPOSE 80
+
+# Start backend and nginx
+COPY docker-entrypoint.sh /docker-entrypoint.sh
+RUN chmod +x /docker-entrypoint.sh
+ENTRYPOINT ["/docker-entrypoint.sh"]