ci: add GitHub Actions workflow for ArgoCD deployment

Author: sfxfs

.github/workflows/deploy_argo.yml

@@ -0,0 +1,62 @@
+name: Deploy Go to ArgoCD (manual)
+
+on:
+  workflow_dispatch:          # ← Manual trigger button
+    inputs:
+      version:
+        description: 'version'
+        required: false
+        default: 'latest'
+        type: string
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      DOCKER_HUB_USERNAME: ${{ secrets.DOCKER_HUB_USERNAME }}
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+      - name: login to dockerhub
+        uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+      - name: build docker image
+        run: |
+          docker build -t "${DOCKER_HUB_USERNAME}/ceramicraft-user-mservice:${{ github.event.inputs.version }}" server/
+      - name: push to dockerhub
+        run: |
+          docker push "${DOCKER_HUB_USERNAME}/ceramicraft-user-mservice:${{ github.event.inputs.version }}"
+  update-argocd:
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout argocd deploy repo
+        uses: actions/checkout@v4
+        with:
+          repository: NUS-ISS-Agile-Team/ceramicraft-argocd-deploy
+          token: ${{ secrets.PAT_TOKEN }}
+          ref: main
+          path: argocd-deploy
+      - name: Update values.yaml tag
+        run: |
+          cd argocd-deploy/helm_backend/user-ms
+          TAG="${{ github.event.inputs.version }}"
+          sed -i.bak "5s|^.*$|  tag: ${TAG}|" values.yaml
+          rm -f values.yaml.bak
+      - name: Commit and push changes
+        env:
+          GIT_AUTHOR_NAME: github-actions[bot]
+          GIT_AUTHOR_EMAIL: github-actions[bot]@users.noreply.github.com
+          GIT_COMMITTER_NAME: github-actions[bot]
+          GIT_COMMITTER_EMAIL: github-actions[bot]@users.noreply.github.com
+        run: |
+          cd argocd-deploy
+          git config user.name "${GIT_AUTHOR_NAME}"
+          git config user.email "${GIT_AUTHOR_EMAIL}"
+          git add helm_backend/user-ms/values.yaml
+          git commit -m "chore(user-ms): bump tag to ${{ github.event.inputs.version }} [skip ci]" || echo "No changes to commit"
+          git push origin HEAD:main