adding build workflow to repo

uploading build image to DH and GHCR

Author: tobiasehlert

.github/workflows/build.yml

@@ -0,0 +1,70 @@
+name: build
+
+on:
+  push:
+    branches:
+      - "main"
+      - "feature-*"
+      - "bug-*"
+    tags:
+      - "v*"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Docker meta
+        id: docker_meta
+        uses: docker/metadata-action@v3.6.0
+        with:
+          images: |
+            tibiadata/tibiadata-api-go
+            ghcr.io/tibiadata/tibiadata-api-go
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1.2.0
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1.6.0
+
+      - name: Cache Docker layers
+        uses: actions/cache@v2.1.6
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+
+      - name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1.12.0
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Login to GitHub Container Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1.12.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v2.7.0
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.docker_meta.outputs.tags }}
+          labels: ${{ steps.docker_meta.outputs.labels }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
+          build-args: |
+            TibiadataBuildBuilder=github
+            TibiadataBuildRelease=${{ github.event.release.tag_name }}
+            TibiadataBuildCommit=${{ github.sha }}