docs: add container destination path for volume mount

Author: DaleSeo

docs/source/deploy.mdx

@@ -72,7 +72,7 @@ docker run \
   -it --rm \
   --name apollo-mcp-server \
   -p 5050:5050 \
-  -v <path/to>/mcp_config.yaml \
+  -v <path/to>/mcp_config.yaml:/config.yaml \
   -v $PWD/graphql/TheSpaceDevs:/data \
   --pull always \
   ghcr.io/apollographql/apollo-mcp-server:latest /config.yaml