Regular Docker build

Signed-off-by: Maksim Derbasov <[email protected]>

.github/workflows/docker-nightly.yml

@@ -0,0 +1,33 @@
+name: nightly docker image builds
+
+on:
+  push:
+  schedule:
+    - cron: '0 6 * * *'
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: docker/setup-buildx-action@v3
+        with:
+          driver: docker
+      - uses: actions/checkout@v4
+        with:
+          repository: gazebosim/gz-sim
+          ref: gz-sim9
+          path: src
+      - name: build base image
+        uses: docker/build-push-action@v6
+        with:
+          file: src/docker/Dockerfile.base
+          context: src
+          tags: gz-sim:base
+          load: true
+      - name: build nightly image
+        uses: docker/build-push-action@v6
+        with:
+          file: src/docker/Dockerfile.nightly
+          build-contexts: |
+            gz-sim:base=docker-image://gz-sim:base
+          context: src