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Merge pull request #2110 from infosiftr/go-modules 

Update Go example to use "go.mod"
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yosifkit 2022-02-04 15:13:04 -08:00 committed by GitHub
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@ -8,20 +8,23 @@ Go (a.k.a., Golang) is a programming language first developed at Google. It is a
# How to use this image # How to use this image
**Note:** `/go` is world-writable to allow flexibility in the user which runs the container (for example, in a container started with `--user 1000:1000`, running `go get github.com/example/...` will succeed). While the `777` directory would be insecure on a regular host setup, there are not typically other processes or users inside the container, so this is equivilant to `700` for Docker usage, but allowing for `--user` flexibility. **Note:** `/go` is world-writable to allow flexibility in the user which runs the container (for example, in a container started with `--user 1000:1000`, running `go get github.com/example/...` into the default `$GOPATH` will succeed). While the `777` directory would be insecure on a regular host setup, there are not typically other processes or users inside the container, so this is equivalent to `700` for Docker usage, but allowing for `--user` flexibility.
## Start a Go instance in your app ## Start a Go instance in your app
The most straightforward way to use this image is to use a Go container as both the build and runtime environment. In your `Dockerfile`, writing something along the lines of the following will compile and run your project: The most straightforward way to use this image is to use a Go container as both the build and runtime environment. In your `Dockerfile`, writing something along the lines of the following will compile and run your project (assuming it uses `go.mod` for dependency management):
```dockerfile ```dockerfile
FROM %%IMAGE%%:1.17 FROM %%IMAGE%%:1.17
WORKDIR /go/src/app WORKDIR /usr/src/app
COPY . .
RUN go get -d -v ./... # pre-copy/cache go.mod for pre-downloading dependencies and only redownloading them in subsequent builds if they change
RUN go install -v ./... COPY go.mod go.sum ./
RUN go mod download && go mod verify
COPY . .
RUN go build -v -o /usr/local/bin/app ./...
CMD ["app"] CMD ["app"]
``` ```