Worker is unable to reach github-proxy (#813)

Author: michaellzc

docker-compose/docker-compose.yaml

@@ -379,6 +379,7 @@ services:
       - 'SEARCHER_URL=http://searcher-0:3181'
       - 'SYMBOLS_URL=http://symbols-0:3184'
       - 'INDEXED_SEARCH_SERVERS=zoekt-webserver-0:6070'
+      - 'GITHUB_BASE_URL=http://github-proxy:3180'
     volumes:
       - 'worker:/mnt/cache'
     networks:

pure-docker/deploy-worker.sh

@@ -21,6 +21,7 @@ docker run --detach \
     -e GOMAXPROCS=1 \
     -e SRC_FRONTEND_INTERNAL=sourcegraph-frontend-internal:3090 \
     -e JAEGER_AGENT_HOST=jaeger \
+    -e GITHUB_BASE_URL=http://github-proxy:3180 \
     -e INDEXED_SEARCH_SERVERS="$(addresses "zoekt-webserver-" $NUM_INDEXED_SEARCH ":6070")" \
     -e SEARCHER_URL="$(addresses "http://searcher-" $NUM_SEARCHER ":3181")" \
     -e SRC_GIT_SERVERS="$(addresses "gitserver-" $NUM_GITSERVER ":3178")" \