feat: add github actions to repository (#46)

.github/workflows/docker.yaml

@@ -0,0 +1,57 @@
+name: docker
+
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - '*.*.*'
+  pull_request:
+    branches:
+      - 'main'
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+                  foomo/pagespeed_exporter
+          # generate Docker tags based on the following events/attributes
+          tags: |
+                  type=ref,event=branch
+                  type=ref,event=pr
+                  type=semver,pattern={{version}}
+                  type=semver,pattern={{major}}.{{minor}}
+                  type=semver,pattern={{major}}
+                  type=sha
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        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
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -21,7 +21,8 @@ COPY . ./
 FROM base as builder
 MAINTAINER  Stefan Martinov <[email protected]>
 
-RUN go build -ldflags "-X main.Version=`git rev-parse --short HEAD`" -o /pagespeed_exporter pagespeed_exporter.go
+RUN GOARCH=amd64 GOOS=linux CGO_ENABLED=0 \
+    go build -ldflags "-X main.Version=`git rev-parse --short HEAD`" -o /pagespeed_exporter pagespeed_exporter.go
 
 # strip and compress the binary
 RUN upx /pagespeed_exporter