feat: add nginx-ingress-controller and nginx build support (#2447)

Signed-off-by: Miguel Martinez <[email protected]>

Author: migmartri

.github/workflows/build_external_container_images.yaml

@@ -58,6 +58,18 @@ jobs:
             path: bitnami/vault-k8s/1/debian-12
             sparse_checkout: bitnami/vault-k8s/1/debian-12
             ref: 62cb6e1498e873dd9ab92880073a43896b470c4b
+          # NGINX Ingress Controller version: 1.12.1
+          - name: NGINX Ingress Controller
+            image_name: chainloop-dev/chainloop/nginx-ingress-controller
+            path: bitnami/nginx-ingress-controller/1/debian-12
+            sparse_checkout: bitnami/nginx-ingress-controller/1/debian-12
+            ref: 87b1dc063ce0a75de731cf6757c1cc5c67ab88e1
+          # NGINX version: 1.27.4 (for default backend)
+          - name: NGINX
+            image_name: chainloop-dev/chainloop/nginx
+            path: bitnami/nginx/1.27/debian-12
+            sparse_checkout: bitnami/nginx/1.27/debian-12
+            ref: 1c185405602d01ad60b5454908c95b91deb5747a
     env:
       REGISTRY: ghcr.io
       IMAGE_NAME: ${{ matrix.image.image_name }}
@@ -134,4 +146,4 @@ jobs:
           echo "Successfully built and pushed ${{ matrix.image.name }} image"
           echo "Image: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}"
           echo "Version: ${{ steps.extract_version.outputs.version }}"
-          echo "Digest: ${{ steps.build.outputs.digest }}"
+          echo "Digest: ${{ steps.build.outputs.digest }}"