Support multiple architectures for docker

* add github container registry 
* refactor!

.github/workflows/docker.yml

@@ -11,28 +11,94 @@ on:
             - "master"
 
 jobs:
-    docker:
+    build:
+        runs-on: ubuntu-latest
+        strategy:
+          matrix:
+            architecture: [linux/amd64,linux/arm64,linux/arm/v7]
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v2
+              with:
+                  submodules: "recursive"
+            - name: Set up QEMU
+              uses: docker/setup-qemu-action@v1
+              with:
+                platforms: ${{ matrix.architecture }}
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v1
+            - name: Cache Docker layers
+              uses: actions/cache@v2
+              with:
+                path: /tmp/.buildx-cache/${{ matrix.architecture }}
+                key: ${{ runner.os }}-buildx-${{ matrix.architecture }}-${{ github.sha }}
+            - name: Build
+              uses: docker/build-push-action@v2
+              with:
+                  context: .
+                  platforms: ${{ matrix.architecture }}
+                  push: false
+                  cache-from: type=local,src=/tmp/.buildx-cache/${{ matrix.architecture }}
+                  cache-to: type=local,dest=/tmp/.buildx-cache-new/${{ matrix.architecture }},mode=max
+            - name: Move cache
+              run: |
+                rm -rf /tmp/.buildx-cache/${{ matrix.architecture }}
+                mv /tmp/.buildx-cache-new/${{ matrix.architecture }} /tmp/.buildx-cache/${{ matrix.architecture }}
+
+    publish:
+        needs: [build]
         runs-on: ubuntu-latest
         steps:
             - name: Checkout
               uses: actions/checkout@v2
               with:
                   submodules: "recursive"
+            - name: Set up QEMU
+              uses: docker/setup-qemu-action@v1
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v1
+            - name: Cache arm64 Docker layers
+              uses: actions/cache@v2
+              with:
+                path: /tmp/.buildx-cache/linux/arm64
+                key: ${{ runner.os }}-buildx-linux/arm64-${{ github.sha }}
+            - name: Cache amd64 Docker layers
+              uses: actions/cache@v2
+              with:
+                path: /tmp/.buildx-cache/linux/amd64
+                key: ${{ runner.os }}-buildx-linux/amd64-${{ github.sha }}
+            - name: Cache armv7 Docker layers
+              uses: actions/cache@v2
+              with:
+                path: /tmp/.buildx-cache/linux/arm/v7
+                key: ${{ runner.os }}-buildx-linux/arm/v7-${{ github.sha }}
             - name: Docker meta
               id: meta
               uses: docker/metadata-action@v3
               with:
-                  images: revoltchat/client
+                  images: revoltchat/client, ghcr.io/revoltchat/client
             - name: Login to DockerHub
               if: github.event_name != 'pull_request'
               uses: docker/login-action@v1
               with:
                   username: ${{ secrets.DOCKERHUB_USERNAME }}
                   password: ${{ secrets.DOCKERHUB_TOKEN }}
-            - name: Build and push
+            - name: Login to Github Container Registry
+              if: github.event_name != 'pull_request'
+              uses: docker/login-action@v1
+              with:
+                  registry: ghcr.io
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+            - name: Publish the Docker images
               uses: docker/build-push-action@v2
               with:
                   context: .
                   push: ${{ github.event_name != 'pull_request' }}
+                  platforms: linux/amd64,linux/arm64,linux/arm/v7
                   tags: ${{ steps.meta.outputs.tags }}
                   labels: ${{ steps.meta.outputs.labels }}
+                  cache-from: |
+                    type=local,src=/tmp/.buildx-cache/linux/amd64
+                    type=local,src=/tmp/.buildx-cache/linux/arm64
+                    type=local,src=/tmp/.buildx-cache/linux/arm/v7