docs: add CircleCI workflows recipe

docs/recipes/circleci-workflows.md

@@ -1 +1,65 @@
-# CircleCI 2.0 workflows
+# Using semantic-release with [CircleCI 2.0 workflows](https://circleci.com/docs/2.0/workflows)
+
+## Environment variables
+
+The [Authentication](../usage/ci-configuration.md#authentication) environment variables can be configured in [CircleCi Project Settings](https://circleci.com/docs/2.0/env-vars/#adding-environment-variables-in-the-app)..
+
+Alternatively, the default `NPM_TOKEN` and `GH_TOKEN` can be easily [setup with semantic-release-cli](../usage/ci-configuration.md#automatic-setup-with-semantic-release-cli).
+
+## Multiple Node jobs configuration
+
+### `.circleci/config.yml` configuration for multiple Node jobs
+
+This example is a minimal configuration for **semantic-release** with a build running Node 6 and 8. See [CircleCI documentation](https://circleci.com/docs/2.0) for additional configuration options.
+
+This example create the workflows `test_node_4`, `test_node_6`, `test_node_8` and `release`. The release workflows will [run `semantic-release` only after the all the `test_node_*` are successful](../usage/ci-configuration.md#run-semantic-release-only-after-all-tests-succeeded).
+
+```yaml
+version: 2
+jobs:
+  test_node_6:
+    docker:
+      - image: circleci/node:6
+    steps:
+      # Configure your test steps here (checkout, npm install, cache management, tests etc...)
+
+  test_node_8:
+    docker:
+      - image: circleci/node:8
+    steps:
+      # Configure your test steps here (checkout, npm install, cache management, tests etc...)
+
+  release:
+    docker:
+      - image: circleci/node:8
+    steps:
+      - checkout
+      - run: npm install
+      # Run optional required steps before releasing
+      # - run: npm run build-script
+      - run: npx semantic-release
+
+workflows:
+  version: 2
+  test_and_release:
+    # Run the test jobs first, then the release only when all the test jobs are successful
+    jobs:
+      - test_node_6
+      - test_node_8
+      - release:
+          requires:
+            - test_node_6
+            - test_node_8
+```
+
+### `package.json` configuration for multiple Node jobs
+
+A `package.json` is required only for [local](../usage/installation.md#local-installation) **semantic-release** installation.
+
+```json
+{
+  "devDependencies": {
+    "semantic-release": "^12.0.0"
+  }
+}
+```