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# Dockerfile References: https://docs.docker.com/engine/reference/builder/.
# Start from the latest golang base image.
FROM golang:alpine AS builder
# Install git.
# Git is required for fetching the dependencies.
RUN apk update && apk add --no-cache git
# Add Maintainer Info.
#LABEL maintainer="Rohith Subramanyam <[email protected]>"
# Set the Current Working Directory inside the container.
WORKDIR /app
# Copy go mod and sum files.
# All the dependent modules do not conform to go mod yet.
#COPY go.mod go.sum ./
# Download all dependencies. Dependencies will be cached if the go.mod and
# go.sum files are not changed.
# All the dependent modules do not conform to go mod yet.
#RUN go mod download
RUN go get github.com/prometheus/alertmanager/template
# Copy the source from the current directory to the Working Directory inside the
# container.
COPY . .
# Build the Go app.
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o amwebhook .
######## Start a new stage from scratch ########
FROM alpine:latest
RUN apk --no-cache add ca-certificates
WORKDIR /root/
# Copy the pre-built binary file from the previous stage.
COPY --from=builder /app/amwebhook .
# Expose port 8080 to the outside world.
EXPOSE 8080
# Command to run the executable.
CMD ["./amwebhook"]