Dockerfile for Go

FROM golang:1.20-alpine AS build

WORKDIR /build
COPY go.mod go.sum ./
RUN go mod download && go mod verify
COPY . .
# Builds the application as a staticly linked one, to allow it to run on alpine
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o run .

# Moving the binary to the 'final Image' to make it smaller
FROM alpine
WORKDIR /app
COPY --from=build /build/run .
CMD ["/app/run"]

FROM golang:1.20-alpine AS build

# Install git and openssh
RUN apt update && apt upgrade -y && \
    apt install -y git make openssh-client

WORKDIR /build
COPY go.mod go.sum ./
RUN go mod download && go mod verify
COPY . .
# Builds the application as a staticly linked one, to allow it to run on alpine
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o run .

# Moving the binary to the 'final Image' to make it smaller
FROM alpine
WORKDIR /app
COPY --from=build /build/run .
CMD ["/app/run"]