feat: update workflows

* build images with automatic tags
* separate staging and production deployment
* reuse workflows

.github/workflows/pull-request.yml

@@ -0,0 +1,28 @@
+name: Pull Request Workflow
+
+on:
+  pull_request:
+
+jobs:
+  ci-checks:
+    uses: ./.github/workflows/ci-checks.yml
+
+  code_review:
+    permissions:
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Code Review GPT
+        uses: mattzcarey/code-review-gpt@v0.1.4-alpha
+        with:
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          MODEL: 'gpt-4-1106-preview'
+          GITHUB_TOKEN: ${{ github.token }}
+
+  build:
+    uses: ./.github/workflows/build.yml
+    needs: ci-checks