ci: add CircleCI config.yml

.circleci/config.yml

@@ -0,0 +1,17 @@
+version: 2.1
+
+jobs:
+  hello-job:
+    docker:
+      - image: cimg/node:17.2.0 # the primary container, where your job's commands are run
+        auth:
+          username: mydockerhub-user
+          password: $DOCKERHUB_PASSWORD # context / project UI env-var reference
+    steps:
+      - checkout # check out the code in the project directory
+      - run: echo "hello world" # run the `echo` command
+
+workflows:
+  my-workflow:
+    jobs:
+      - hello-job