ci: Added github actions to build and push new images regularly

Author: frol

.github/workflows/build-and-push.yaml

@@ -0,0 +1,35 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - 'master'
+  schedule:
+    # Daily
+    - cron: '0 0 * * *'
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        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.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          pull: true
+          push: true
+          tags: frolvlad/alpine-ocaml:latest
+          cache-from: type=registry,ref=frolvlad/alpine-ocaml:latest
+          cache-to: type=inline