feat: generate Dockerfile for Golang app

Part of #42

README.md

@@ -49,7 +49,7 @@ Generates the endpoints (or a whole app) from a mapping (SQL query -> URL)
    | -----------| ----------------------------| ---------------------------| --------- |
    | JavaScript | `npx query2app --lang js`   | [`app.js`](examples/js/express/mysql/app.js)<br/>[`routes.js`](examples/js/express/mysql/routes.js)<br/>[`package.json`](examples/js/express/mysql/package.json)<br/>[`Dockerfile`](examples/js/express/mysql/Dockerfile) | Web: [`express`](https://www.npmjs.com/package/express)<br>Database: [`mysql`](https://www.npmjs.com/package/mysql) |
    | TypeScript | `npx query2app --lang ts`   | [`app.ts`](examples/ts/express/mysql/app.ts)<br/>[`routes.ts`](examples/ts/express/mysql/routes.ts)<br/>[`package.json`](examples/ts/express/mysql/package.json)<br/>[`tsconfig.json`](examples/ts/express/mysql/tsconfig.json)<br/>[`Dockerfile`](examples/ts/express/mysql/Dockerfile) | Web: [`express`](https://www.npmjs.com/package/express)<br>Database: [`mysql`](https://www.npmjs.com/package/mysql) |
-   | Golang     | `npx query2app --lang go`   | [`app.go`](examples/go/chi/mysql/app.go)<br/>[`routes.go`](examples/go/chi/mysql/routes.go)<br/>[`go.mod`](examples/go/chi/mysql/go.mod) | Web: [`go-chi/chi`](https://github.com/go-chi/chi)<br/>Database: [`go-sql-driver/mysql`](https://github.com/go-sql-driver/mysql), [`jmoiron/sqlx`](https://github.com/jmoiron/sqlx) |
+   | Golang     | `npx query2app --lang go`   | [`app.go`](examples/go/chi/mysql/app.go)<br/>[`routes.go`](examples/go/chi/mysql/routes.go)<br/>[`go.mod`](examples/go/chi/mysql/go.mod)<br/>[`Dockerfile`](examples/go/chi/mysql/Dockerfile) | Web: [`go-chi/chi`](https://github.com/go-chi/chi)<br/>Database: [`go-sql-driver/mysql`](https://github.com/go-sql-driver/mysql), [`jmoiron/sqlx`](https://github.com/jmoiron/sqlx) |
    | Python     | `npx query2app --lang python` | [`app.py`](examples/python/fastapi/postgres/app.py)<br/>[`db.py`](examples/python/fastapi/postgres/db.py)<br/>[`routes.py`](examples/python/fastapi/postgres/routes.py)<br/>[`requirements.txt`](examples/python/fastapi/postgres/requirements.txt)<br/>[`Dockerfile`](examples/python/fastapi/postgres/Dockerfile) | Web: [FastAPI](https://github.com/tiangolo/fastapi), [Uvicorn](https://www.uvicorn.org)<br/>Database: [psycopg2](https://pypi.org/project/psycopg2/) |
 
 1. Run the application

examples/go/chi/mysql/Dockerfile

@@ -0,0 +1,11 @@
+FROM golang:1.14 AS builder
+WORKDIR /opt
+COPY go.mod ./
+RUN go mod download
+COPY *.go ./
+RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o app
+
+FROM scratch
+WORKDIR /opt/app
+COPY --from=builder /opt/app .
+CMD [ "/opt/app/app" ]

src/cli.js

@@ -322,9 +322,6 @@ const createDependenciesDescriptor = async (destDir, { lang }) => {
 }
 
 const createDockerfile = async (destDir, lang) => {
-    if (lang == 'go') {
-        return
-    }
     const fileName = 'Dockerfile'
     console.log('Generate', fileName)
 

src/templates/Dockerfile.go

@@ -0,0 +1,11 @@
+FROM golang:1.14 AS builder
+WORKDIR /opt
+COPY go.mod ./
+RUN go mod download
+COPY *.go ./
+RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o app
+
+FROM scratch
+WORKDIR /opt/app
+COPY --from=builder /opt/app .
+CMD [ "/opt/app/app" ]