Add base kubernetes support 3

frontend/Dockerfile.kubernetes

@@ -40,8 +40,16 @@ COPY <<'EOF' /docker-entrypoint.d/30-substitute-env.sh
 #!/bin/sh
 set -e
 
-# Default values for environment variables
-export VITE_API_URL=${VITE_API_URL:-"http://gateway-service:8000"}
+# Handle VITE_API_URL specially to preserve empty values
+# If VITE_API_URL is unset, use default; if empty, preserve empty; otherwise use value
+if [ -z "${VITE_API_URL+x}" ]; then
+  export VITE_API_URL="http://gateway-service:8000"
+elif [ -z "$VITE_API_URL" ]; then
+  # If VITE_API_URL is explicitly set to empty string, preserve it
+  export VITE_API_URL=""
+fi
+
+# Default values for other environment variables
 export VITE_APP_TITLE=${VITE_APP_TITLE:-"PanIA Dashboard"}
 export VITE_APP_VERSION=${VITE_APP_VERSION:-"1.0.0"}
 
@@ -92,4 +100,4 @@ HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
   CMD curl -f http://localhost:3000/health || exit 1
 
 # Start nginx
-CMD ["nginx", "-g", "daemon off;"]
+CMD ["nginx", "-g", "daemon off;"]

frontend/vite.config.ts

@@ -28,10 +28,11 @@ export default defineConfig({
     },
     proxy: {
       '/api': {
-        target: process.env.VITE_API_URL ||
-                (process.env.NODE_ENV === 'development' && process.env.KUBERNETES_SERVICE_HOST
-                  ? 'http://gateway-service:8000'  // Kubernetes internal service
-                  : 'http://localhost:8000'),      // Local development
+        target: process.env.VITE_API_URL !== undefined 
+                ? (process.env.VITE_API_URL || '')  // Use value or empty string
+                : (process.env.NODE_ENV === 'development' && process.env.KUBERNETES_SERVICE_HOST
+                    ? 'http://gateway-service:8000'  // Kubernetes internal service
+                    : 'http://localhost:8000'),      // Local development
         changeOrigin: true,
         rewrite: (path) => path.replace(/^\/api/, ''),
       },
@@ -51,4 +52,4 @@ export default defineConfig({
       },
     },
   },
-});
+});