Add dockerfile and CI

.github/workflows/docker-image.yaml

@@ -0,0 +1,26 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v3
+        with:
+          push: true
+          tags: ghcr.io/ayamine47/sumika:latest

Dockerfile

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+FROM golang:alpine AS build
+ADD . /go/src/sumika/
+ARG GOARCH=amd64
+ENV GOARCH ${GOARCH}
+ENV CGO_ENABLED 0
+WORKDIR /go/src/sumika
+RUN go build .
+
+FROM alpine
+COPY --from=build /go/src/sumika /bin/sumika
+WORKDIR /data
+CMD sumika