chore: add CI/CD workflow

.github/workflows/cd.yml

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+name: cd
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: cd
+  cancel-in-progress: true
+
+jobs:
+  deploy_api_server:
+    name: Push Docker image to Docker Hub, Deploy API Server.
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v3
+        with:
+          ref: ${{ github.ref_name }}
+
+      - name: Set short git commit SHA
+        id: vars
+        run: |
+          calculatedSha=$(git rev-parse --short ${{ github.sha }})
+          echo "::set-output name=short_sha::$calculatedSha"
+        
+      - name: Confirm git commit SHA output
+        run: echo ${{ steps.vars.outputs.short_sha }}
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/api-server:${{ steps.vars.outputs.short_sha }}
+
+      - name: Deploy to K8S
+        uses: appleboy/[email protected]
+        with:
+          host: ${{ secrets.HOST }}
+          username: ${{ secrets.USERNAME }}
+          password: ${{ secrets.PASSWORD }}
+          port: ${{ secrets.PORT }}
+          script: kubectl set image deploy/api-server api-server=${{ secrets.DOCKERHUB_USERNAME }}/api-server:${{ steps.vars.outputs.short_sha }}

.github/workflows/ci.yml

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+name: ci
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: ci
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: './consumer/go.mod'
+
+      - name: Build
+        working-directory: ./consumer
+        run: go build -v -o ./server ./cmd/server
+
+      - name: Test
+        working-directory: ./consumer
+        run: go test -v ./cmd/server

Dockerfile

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+FROM golang:alpine
+
+WORKDIR /app
+
+COPY go.mod .
+COPY go.sum .
+
+RUN go mod download
+
+COPY . .
+
+RUN go build -o ./server ./cmd/server
+
+CMD [ "./server" ]