Example multi-stage build container used with lambda docker support

Dockerfile

#
# Based on https://docs.docker.com/develop/develop-images/multistage-build/
#
FROM public.ecr.aws/amazonlinux/amazonlinux:latest AS builder

WORKDIR /src
RUN yum install go -y
RUN yum install make -y
ADD . /src

#
# make build will output binaries to dist/ with a naming standard following $(name)-lambda
#
# NOTE: add a target to vendor code eg. `go mod vendor` before running build to save downloading deps in the container.
RUN make build

#
# Using a seperate container for running the service means your code isn't shipped to production, only the binaries are copied.
#
FROM public.ecr.aws/lambda/go:latest

#
# copy all the build lambda functions to
#
COPY --from=builder /src/dist/*-lambda ${LAMBDA_TASK_ROOT}/

Makefile

GIT_HASH := $(shell git rev-parse --short HEAD)
LDFLAGS := -ldflags="-s -w -X main.commit=${GIT_HASH}"

build:
	@echo "--- build all the things"
	@mkdir -p dist
	@go build $(LDFLAGS) -trimpath -o dist ./cmd/...
.PHONY: build