FROM docker.io/golang:alpine

RUN addgroup -S app && adduser -S -g app app

WORKDIR /app

RUN apk add --update npm
RUN npm i sass govuk-frontend --save

# Switch to root user
USER root

COPY go.mod ./
RUN go mod download && go mod verify

COPY . .
RUN chown -R app:app /app

# Create a directory for the binary
RUN mkdir /app/bin
RUN chown app:app /app/bin

# Switch back to app user
USER app

# Build the Go binary in the /app/bin directory
RUN go build -v -o /app/bin/app ./cmd/web

# Set the working directory to /app/bin
WORKDIR /app/bin

CMD ["./app"]
EXPOSE 4000