fix: enhance stdio wrapper for Docker clean JSON-RPC output

- Set environment variables BEFORE imports in stdio-wrapper
- Override ALL console methods to prevent any output
- Update docker-entrypoint.sh to use exec for proper signal handling
- Add fallback if stdio-wrapper.js is missing
- Remove background process handling in stdio mode

This ensures absolutely no log output corrupts the JSON-RPC stream

docker/docker-entrypoint.sh

@@ -44,10 +44,21 @@ fi
 
 # Execute the main command in background
 # In stdio mode, use the wrapper for clean output
-if [ "$MCP_MODE" = "stdio" ] && [ -f "/app/dist/mcp/stdio-wrapper.js" ]; then
-    node /app/dist/mcp/stdio-wrapper.js &
+if [ "$MCP_MODE" = "stdio" ]; then
+    # Debug: Log to stderr to check if wrapper exists
+    if [ "$DEBUG_DOCKER" = "true" ]; then
+        echo "MCP_MODE is stdio, checking for wrapper..." >&2
+        ls -la /app/dist/mcp/stdio-wrapper.js >&2 || echo "Wrapper not found!" >&2
+    fi
+    
+    if [ -f "/app/dist/mcp/stdio-wrapper.js" ]; then
+        # Use the stdio wrapper for clean JSON-RPC output
+        exec node /app/dist/mcp/stdio-wrapper.js
+    else
+        # Fallback: run with explicit environment
+        exec env MCP_MODE=stdio DISABLE_CONSOLE_OUTPUT=true LOG_LEVEL=error node /app/dist/mcp/index.js
+    fi
 else
-    "$@" &
-fi
-PID=$!
-wait $PID
+    # HTTP mode or other
+    exec "$@"
+fi