Added CI config.

.circleci/config.yml

@@ -0,0 +1,25 @@
+version: 2
+jobs:
+  lint:
+    docker:
+      - image: circleci/node:10.15
+    steps:
+      - checkout
+      - run: yarn
+      - run: yarn run lint
+  test:
+    docker:
+      - image: circleci/node:10.15
+    environment:
+      HOME_RPC_URL: http://example.com
+      FOREIGN_RPC_URL: http://example.com
+    steps:
+      - checkout
+      - run: yarn
+      - run: yarn run test
+workflows:
+  version: 2
+  poa-bridge-monorepo:
+    jobs:
+      - lint
+      - test