init

cmd/api/main.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/labstack/echo/v4"
+)
+
+func main() {
+	e := echo.New() // echo を利用する
+	// GET リクエストでパスが `/` のとき第２引数の関数を実行する
+	e.GET("/", func(c echo.Context) error {
+		return c.String(http.StatusOK, "Hello, World!")
+	})
+
+	// 1323 ポートでリッスンを開始。 start がエラーを起こしたら Fatal を起こしてログに記録する
+	e.Logger.Fatal(e.Start(":1323"))
+}

cmd/cli/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("hello")
+}

docker-compose.yaml

@@ -0,0 +1,11 @@
+version: "3"
+services: 
+  app: # サービスの名前
+    build:
+      context: .
+      dockerfile: docker/app/Dockerfile
+    tty: true
+    ports:
+      - 1323:1323
+    volumes:
+      - .:/go/src/app

docker/app/Dockerfile

@@ -0,0 +1,14 @@
+FROM golang:1.17.6 as builder
+WORKDIR /workspace
+COPY . /workspace
+# alpine でも実行できるように GOOS と CGO_ENABLED を指定
+RUN CGO_ENABLED=0 GOOS=linux go build -o main cmd/api/main.go && chmod +x ./main
+
+FROM alpine:3.15
+WORKDIR /app
+RUN apk --no-cache add ca-certificates
+# root ユーザだとなんでもできてしまうため appuser を作成する
+RUN addgroup -S appgroup && adduser -S appuser -G appgroup
+COPY --from=builder /workspace/main ./
+# コンテナを立ち上げたとき、勝手にWeb サーバーを立ち上げる
+CMD ["./main"]

go.mod

@@ -0,0 +1,17 @@
+module go-docker-handson
+
+go 1.17
+
+require github.com/labstack/echo/v4 v4.6.3
+
+require (
+	github.com/labstack/gommon v0.3.1 // indirect
+	github.com/mattn/go-colorable v0.1.11 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/valyala/bytebufferpool v1.0.0 // indirect
+	github.com/valyala/fasttemplate v1.2.1 // indirect
+	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 // indirect
+	golang.org/x/net v0.0.0-20210913180222-943fd674d43e // indirect
+	golang.org/x/sys v0.0.0-20211103235746-7861aae1554b // indirect
+	golang.org/x/text v0.3.7 // indirect
+)

go.sum

@@ -0,0 +1,44 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/golang-jwt/jwt v3.2.2+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
+github.com/labstack/echo/v4 v4.6.3 h1:VhPuIZYxsbPmo4m9KAkMU/el2442eB7EBFFhNTTT9ac=
+github.com/labstack/echo/v4 v4.6.3/go.mod h1:Hk5OiHj0kDqmFq7aHe7eDqI7CUhuCrfpupQtLGGLm7A=
+github.com/labstack/gommon v0.3.1 h1:OomWaJXm7xR6L1HmEtGyQf26TEn7V6X88mktX9kee9o=
+github.com/labstack/gommon v0.3.1/go.mod h1:uW6kP17uPlLJsD3ijUYn3/M5bAxtlZhMI6m3MFxTMTM=
+github.com/mattn/go-colorable v0.1.11 h1:nQ+aFkoE2TMGc0b68U2OKSexC+eq46+XwZzWXHRmPYs=
+github.com/mattn/go-colorable v0.1.11/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
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+github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
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