Add GitHub Actions workflows for Elsa Docker images

This commit introduces two new GitHub Actions workflows: one for building and deploying the Elsa Server + Studio Docker image, and another for the Elsa Server Docker image. Both processes automate the build and push actions to Docker Hub using the latest ubuntu version and buildx for multi-platform support.

.github/workflows/elsa-server-and-studio.yml

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+name: Build and deploy Elsa Server + Studio reference application as Docker image
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        with:
+          platforms: all
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            elsaworkflows/elsa-server-and-studio-v3
+          flavor: |
+            latest=true
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=sha
+
+      - name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_PASS }}
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v3
+        with:
+          builder: ${{ steps.buildx.outputs.name }}
+          context: .
+          file: ./docker/ElsaServerAndStudio.Dockerfile
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}

.github/workflows/elsa-server.yml

@@ -0,0 +1,61 @@
+name: Build and deploy Elsa Server reference application as Docker image
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        with:
+          platforms: all
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            elsaworkflows/elsa-server-v3
+          flavor: |
+            latest=true
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=sha
+
+      - name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_PASS }}
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v3
+        with:
+          builder: ${{ steps.buildx.outputs.name }}
+          context: .
+          file: ./docker/ElsaServer.Dockerfile
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}