ci: Adding image update automation webhook

Author: ViBiOh

.github/workflows/build.yml

@@ -61,6 +61,7 @@ jobs:
         run: |
           curl --disable --silent --show-error --location --max-time 30 "https://raw.githubusercontent.com/ViBiOh/scripts/main/bootstrap" | bash -s "docker_promote"
           scripts/docker_promote "${{ secrets.DOCKER_USER }}/$(make name)" "$(make version)"
+          curl --header "X-Signature: sha1=$(printf '{}' | openssl dgst -sha1 -hmac '${FLUX_TOKEN}')" --data '{}' "${FLUX_WEBHOOK_URL}"
       - name: GoReport
         run: |
           curl --disable --silent --show-error --location --max-time 30 -X POST https://goreportcard.com/checks?repo=github.com/${GITHUB_REPOSITORY}