Dockerize (binaryholdings#16)

.github/workflows/deploy.yml

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+name: ci
+
+on:
+  push:
+    branches: ['main', 'master']
+    tags: ['*']
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  release-docker:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest
+            type=semver,pattern=v{{version}}
+
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          push: true
+          context: .
+          platforms: linux/amd64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+

Dockerfile

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+# 1st stage, build app
+FROM golang:1.19-alpine as builder
+
+COPY . /app
+
+WORKDIR /app
+
+RUN go build -o cosmprund
+
+
+FROM alpine
+
+COPY --from=builder /app/cosmprund /usr/bin/cosmprund
+
+ENTRYPOINT [ "/usr/bin/cosmprund" ]