Update docker-compose.yml

Co-authored-by: Kaloyan Tanev <24719519+KaloyanTanev@users.noreply.github.com>
Signed-off-by: Oisín Kyne <4981644+OisinKyne@users.noreply.github.com>

Author: OisinKyne

docker-compose.yml

@@ -85,7 +85,7 @@ services:
     image: obolnetwork/charon:${CHARON_VERSION:-v1.3.0}
     environment:
       - CHARON_BEACON_NODE_ENDPOINTS=${CHARON_BEACON_NODE_ENDPOINTS:-http://lighthouse:5052}
-      - CHARON_BEACON_NODE_HEADERS=${CHARON_BEACON_NODE_HEADERS:-Dummy=Header}
+      - CHARON_BEACON_NODE_HEADERS=${CHARON_BEACON_NODE_HEADERS:-}
       - CHARON_BEACON_NODE_TIMEOUT=${CHARON_BEACON_NODE_TIMEOUT:-3s}
       - CHARON_BEACON_NODE_SUBMIT_TIMEOUT=${CHARON_BEACON_NODE_SUBMIT_TIMEOUT:-4s}
       - CHARON_FALLBACK_BEACON_NODE_ENDPOINTS=${CHARON_FALLBACK_BEACON_NODE_ENDPOINTS:-}