Dockerfile

###############################################################################
# Build stage
###############################################################################
FROM golang:latest AS builder

# Create and/or change our directory to /build
WORKDIR /build

# Copy go mod & go.sum files so we can verify they haven't been tampered with
COPY go.mod go.sum ./
RUN go mod download && go mod verify

# Copy everything from our root into /build
COPY . .

# Create and/or change our directory to /new-project-monitor
WORKDIR /build/cmd/new-project-monitor

# Create the binary for the app
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o app-binary

###############################################################################
# Production stage
###############################################################################
# Start a new stage from scratch so that our final image is way smaller
# We use alpine instead of stratch since we need OS packages
FROM alpine:latest

# Create and/or change our directory to /app
WORKDIR /app

# Copy the binary from the build stage to the final stage
COPY --from=builder  /build/cmd/new-project-monitor .


# Expose Port
EXPOSE 8080

# Run the app
CMD ["/app/app-binary"]