Fix SMTP proxy certificates and speed up CI

.github/workflows/ci.yml

@@ -35,16 +35,13 @@ jobs:
         run: npx next typegen && npx tsc --noEmit
       - name: Test
         run: npm test
-      - name: Build
-        env:
-          NODE_ENV: production
-        run: npm run build
 
   build-image:
     needs: test
     if: github.ref == 'refs/heads/main' && github.event_name == 'push'
     runs-on: ubuntu-latest
     permissions:
+      actions: write
       contents: read
       packages: write
     env:
@@ -58,7 +55,13 @@ jobs:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Build image
-        run: docker build -t "$IMAGE:$GITHUB_SHA" .
-      - name: Push image
-        run: docker push "$IMAGE:$GITHUB_SHA"
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Build and push image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ env.IMAGE }}:${{ github.sha }}
+          cache-from: type=gha,scope=anouma-image
+          cache-to: type=gha,mode=max,scope=anouma-image