Add ucs build on older image version (#531)

(cherry picked from commit 92dd2833d1)

.github/workflows/stable-build.yml

@@ -92,3 +92,39 @@ jobs:
           export TAG=${{ github.event.inputs.tag }}
           docker buildx bake -f docker-bake.hcl ${{ matrix.images }} --push
         shell: bash
+
+  build-ucs-ubuntu20:
+    name: "Release image: DocumentServer${{ matrix.edition }}-ucs"
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        edition: ["", "-ee"]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+
+      - name: build UCS
+        run: |
+           set -eux
+           export PRODUCT_EDITION=${{ matrix.edition }}
+           export PACKAGE_BASEURL=${{ secrets.REPO_BASEURL }}/testing/ubuntu
+           export DOCKERFILE=Dockerfile
+           export BASE_IMAGE=ubuntu:20.04
+           export PG_VERSION=12
+           export TAG=${{ github.event.inputs.tag }}
+           export PACKAGE_VERSION=$( echo ${TAG} |  sed -E 's/(.*)\./\1-/')
+           docker buildx bake -f docker-bake.hcl documentserver-ucs --push
+        shell: bash

docker-bake.hcl

@@ -50,6 +50,18 @@ variable "RELEASE_BRANCH" {
     default = ""
 }
 
+### ↓ Variables for UCS build ↓
+
+variable "BASE_IMAGE" {
+    default     = ""
+}
+
+variable "PG_VERSION" {
+    default     = ""
+}
+
+### ↑ Variables for UCS build ↑
+
 target "documentserver" {
     target = "documentserver"
     dockerfile = "${DOCKERFILE}"
@@ -85,6 +97,24 @@ target "documentserver-stable" {
     }
 }
 
+target "documentserver-ucs" {
+    target = "documentserver"
+    dockerfile = "${DOCKERFILE}"
+    tags = [
+           "docker.io/${COMPANY_NAME}/${PRODUCT_NAME}${PRODUCT_EDITION}-ucs:${TAG}"
+           ]
+    platforms = ["linux/amd64", "linux/arm64"]
+    args = {
+        "PRODUCT_EDITION": "${PRODUCT_EDITION}"
+        "PRODUCT_NAME": "${PRODUCT_NAME}"
+        "COMPANY_NAME": "${COMPANY_NAME}"
+        "PACKAGE_VERSION": "${PACKAGE_VERSION}"
+        "PACKAGE_BASEURL": "${PACKAGE_BASEURL}"
+        "BASE_IMAGE": "${BASE_IMAGE}"
+        "PG_VERSION": "${PG_VERSION}"
+    }
+}
+
 target "documentserver-nonexample" {
     target = "documentserver-nonexample"
     dockerfile = "production.dockerfile"