expose tcp port 8080 (http gateway)

Dockerfile

@@ -28,5 +28,7 @@ RUN wget -O- https://dist.ipfs.io/go-ipfs/v${IPFS_VERSION}/go-ipfs_v${IPFS_VERSI
 
 USER ipfs
 EXPOSE 4001/tcp
+# ipfs http gateway
+EXPOSE 8080/tcp
 ENV IPFS_INIT_PROFILE server
 CMD ["ipfs", "daemon", "--init", "--init-profile", "$IPFS_INIT_PROFILE"]