Take a stab at setting up CI

.circleci/config.yml

+# Copyright 2019 PrivateStorage.io, LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+version: 2
+
+jobs:
+  build:
+    docker:
+      - image: "nixos/nix:2.2.1"
+    steps:
+      - "checkout"
+
+      - run:
+          name: "Nix Build"
+          command: |
+            nix-build
+
+      - store_artifacts:
+          path: "result/docs"
+          destination: "docs"
+
+workflows:
+  version: 2
+  everything:
+    jobs:
+      - "build"