Dockerfile

# syntax=docker/dockerfile:1

# Build
ARG ARCH

# Build the web app.
FROM node:20 as web-builder

WORKDIR /app
COPY ./web /app

RUN npm config set registry http://registry.npmjs.org/
RUN npm install --verbose
RUN npm run build


# Build the Go binary.
# Alpine is chosen for its small footprint
# compared to Ubuntu
FROM golang:1.21-alpine as builder

# Need to redeclare ARCH to use in Go build stage
ARG ARCH
ARG ldflags

# Set working directory
WORKDIR /app

# Download necessary Go modules
COPY go.mod ./
COPY go.sum ./

RUN --mount=type=cache,target=/go/pkg/mod \
go mod download

COPY ./main.go /app/
COPY ./internal /app/internal
COPY ./version /app/version
COPY ./api /app/api

RUN CGO_ENABLED=0 GOARCH=${ARCH} go build -trimpath -ldflags "${ldflags} -extldflags '-static'" -o main

# Build production image
FROM gcr.io/distroless/static:nonroot-${ARCH}

# Set working directory
WORKDIR /app

COPY --from=builder /app/main /app/main

COPY --from=web-builder /app/dist /app/web/dist

EXPOSE 8081

ENTRYPOINT [ "/app/main", "-host", "0.0.0.0", "-generate-config" ]