message: Update outline-ss-server to v1.0.7 and docker node to v8.15.0
diff: # limitations under the License.
  # See versions at https://hub.docker.com/_/node/
  -FROM node:8.14.0-alpine
  +FROM node:8.15.0-alpine
  # Versions can be found at https://github.com/Jigsaw-Code/outline-ss-server/releases
  -ARG SS_VERSION=1.0.4
  +ARG SS_VERSION=1.0.7
  # Save metadata on the software versions we are using.
  -LABEL shadowbox.node_version=8.14.0
  +LABEL shadowbox.node_version=8.15.0
  LABEL shadowbox.outline-ss-server_version="${SS_VERSION}"
  ARG GITHUB_RELEASE
  