setup arm64 unit testing CircleCI (#668)

(cherry picked from commit fb12092)

.circleci/config.yml

@@ -0,0 +1,71 @@
+version: 2.1
+
+executors:
+  amd64:
+    machine:
+      image: ubuntu-2004:current
+    resource_class: large
+  arm64:
+    machine:
+      image: ubuntu-2004:current
+    resource_class: arm.large
+
+jobs:
+  unit-test:
+    parameters:
+      platform:
+        type: executor
+    executor: << parameters.platform >>
+    working_directory: ~/repo
+    steps:
+      - checkout
+      - run:
+          name: Install Docker Compose
+          environment:
+            COMPOSE_VERSION: 'v2.17.1'
+          command: |
+            curl -L "https://github.com/docker/compose/releases/download/${COMPOSE_VERSION}/docker-compose-$(uname -s)-$(uname -m)" -o ~/docker-compose
+            chmod +x ~/docker-compose
+            sudo mv ~/docker-compose /usr/local/bin/docker-compose
+      - run:
+          name: Set up databases
+          command: docker-compose up -d
+          working_directory: ./storage
+      - run:
+          name: Set up dataset
+          command: |
+            mkdir -p ~/.gorse/dataset
+            mkdir -p ~/.gorse/download
+            wget https://cdn.gorse.io/datasets/ml-100k.zip -P ~/.gorse/download
+            wget https://cdn.gorse.io/datasets/ml-1m.zip -P ~/.gorse/download
+            wget https://cdn.gorse.io/datasets/pinterest-20.zip -P ~/.gorse/download
+            wget https://cdn.gorse.io/datasets/frappe.zip -P ~/.gorse/download
+            wget https://cdn.gorse.io/datasets/ml-tag.zip -P ~/.gorse/download
+            wget https://cdn.gorse.io/datasets/criteo.zip -P ~/.gorse/download
+            unzip ~/.gorse/download/ml-100k.zip -d ~/.gorse/dataset
+            unzip ~/.gorse/download/ml-1m.zip -d ~/.gorse/dataset
+            unzip ~/.gorse/download/pinterest-20.zip -d ~/.gorse/dataset
+            unzip ~/.gorse/download/frappe.zip -d ~/.gorse/dataset
+            unzip ~/.gorse/download/ml-tag.zip -d ~/.gorse/dataset
+            unzip ~/.gorse/download/criteo.zip -d ~/.gorse/dataset
+      - restore_cache:
+          keys:
+            - go-mod-v4-{{ checksum "go.sum" }}
+      - run:
+          name: Install Dependencies
+          command: go mod download
+      - save_cache:
+          key: go-mod-v4-{{ checksum "go.sum" }}
+          paths:
+            - "/go/pkg/mod"
+      - run:
+          name: Run tests
+          command: go test -timeout 20m -v ./...
+
+workflows:
+  unit-test:
+    jobs:
+      - unit-test:
+          matrix:
+            parameters:
+              platform: [amd64, arm64]