Use docker build to create multi-arch images (#202)

* Buildx docker image

* Doker hub user on image name

* Change destination platforms

Co-authored-by: Matteo Pietro Dazzi <matteopietro.dazzi@gft.com>

.github/workflows/build_only.yml

@@ -0,0 +1,19 @@
+name: Build only image
+on:
+    push:
+        branches:
+            - master
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        name: Build image job
+        steps:
+            - name: Checkout master
+              uses: actions/checkout@master
+            - name: Build image
+              uses: ilteoood/docker_buildx@master
+              with:
+                tag: latest,0.3.0
+                platform: linux/amd64,linux/arm64,linux/ppc64le,linux/s390x,linux/arm/v7
+                imageName: ${{ secrets.DOCKER_HUB_USER }}/webssh2

.github/workflows/build_publish.yml

@@ -0,0 +1,23 @@
+name: Build and publish image
+on:
+  release:
+    types: [published]
+  schedule:
+    - cron: '0 6 * * 1'
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        name: Build image job
+        steps:
+            - name: Checkout master
+              uses: actions/checkout@master
+            - name: Build and publish image
+              uses: ilteoood/docker_buildx@master
+              with:
+                tag: latest,0.3.0
+                imageName: ${{ secrets.DOCKER_HUB_USER }}/webssh2
+                platform: linux/amd64,linux/arm64,linux/ppc64le,linux/s390x,linux/arm/v7
+                publish: true
+                dockerHubUser: ${{ secrets.DOCKER_HUB_USER }}
+                dockerHubPassword: ${{ secrets.DOCKER_HUB_PASSWORD }}