Add shared Erlang builder/runtime base images from registry.

Publish erlang-builder and erlang-runtime as :latest, use them in prod and API test builds, auto-collect NIF libs, and sync CI to pull/push bases before eventhub build.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitea/workflows/ci.yml

@@ -25,6 +25,29 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Login to registry
+        if: github.event_name == 'push'
+        env:
+          REGISTRY_USER: ${{ secrets.REGISTRY_USER }}
+          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
+        run: |
+          bash scripts/retry-docker-build.sh 5 30 -- \
+            bash -c 'echo "${REGISTRY_PASSWORD}" | docker login git.sabilin.com -u "${REGISTRY_USER}" --password-stdin'
+
+      - name: Ensure Erlang base images (registry :latest)
+        run: |
+          set -euo pipefail
+          FORCE=""
+          if CHANGED="$(git diff --name-only HEAD~1..HEAD 2>/dev/null || true)" \
+            && echo "${CHANGED}" | grep -q '^docker/erlang/'; then
+            FORCE="--force-build"
+          fi
+          bash scripts/build-erlang-base-images.sh ${FORCE}
+
+      - name: Push Erlang base images
+        if: github.event_name == 'push'
+        run: bash scripts/build-erlang-base-images.sh --push
+
       - name: Build eventhub image
         run: |
           set -euo pipefail
@@ -56,15 +79,6 @@ jobs:
       - name: Run API tests (local CT)
         run: docker run --rm eventhub-api-tests:latest
 
-      - name: Login to registry
-        if: github.event_name == 'push'
-        env:
-          REGISTRY_USER: ${{ secrets.REGISTRY_USER }}
-          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
-        run: |
-          bash scripts/retry-docker-build.sh 5 30 -- \
-            bash -c 'echo "${REGISTRY_PASSWORD}" | docker login git.sabilin.com -u "${REGISTRY_USER}" --password-stdin'
-
       - name: Push tested eventhub image
         if: github.event_name == 'push'
         run: |