Merge pull request #2618 from ipfs/dockerfile-logging

docker: allow IPFS_LOGGING to be passed

Dockerfile

@@ -26,6 +26,8 @@ EXPOSE 8080
 ENV GX_IPFS   ""
 # The IPFS fs-repo within the container
 ENV IPFS_PATH /data/ipfs
+# The default logging level
+ENV IPFS_LOGGING ""
 # Golang stuff
 ENV GO_VERSION 1.5.4-r0
 ENV GOPATH     /go

test/Dockerfile

@@ -16,6 +16,7 @@ EXPOSE 8080
 
 ENV GX_IPFS   ""
 ENV IPFS_PATH /data/ipfs
+ENV IPFS_LOGGING ""
 ENV GO_VERSION 1.5.4-r0
 ENV GOPATH     /go
 ENV PATH       /go/bin:$PATH