Add workflow

.github/workflows/dlib-builder.yml

+# This is a basic workflow to help you get started with Actions
+
+name: Build dlib dependency
+
+# Controls when the workflow will run
+on:
+  # Triggers the workflow on push or pull request events but only for the main branch
+  push:
+    # Publish `dev` as Docker `latest` image.
+    branches:
+      - main
+    paths:
+      - 'dependencies/dlib/**'
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: ./backend/base
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: reallibrephotos/dlib-builder:dev
+      - name: Upload a Build Artifact
+        uses: actions/upload-artifact@v2.3.1
+        with:
+          name: dlib
+          path: /tmp/builds/dlib.zip