Dockerfile

Docker allows developers to package their applications along with all dependencies into a single unit called a container. This ensures consistency across different environments, such as development, testing, and production, reducing the "it works on my machine" problem.

Install Docker: https://docs.docker.com/engine/install/

Add Makefile

A Makefile is a special file used in software development projects, particularly in Unix-like operating systems, to automate the compilation and building of executable programs or libraries from source code.

Add Makefile:

# Binary name
BINARY_NAME=lr_ft_books

.PHONY: lint

lint:
	@echo "Linting..."
	golangci-lint run

build:
	@echo "Building $(BINARY_NAME)..."
	go build -o $(BINARY_NAME)

build-linux:
	@echo "Building $(BINARY_NAME) for Linux..."
	GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o $(BINARY_NAME)

We‘re building for Linux because these binaries will be deployed in a Linux environment inside Docker.

Run make build to build the binary:

make build-linux

Dockerfile for the service

Add Dockerfile:

# alpine linux
FROM alpine:3.19

ENV APP_BIN=lr_ft_books
ARG SERVER_DIR=/home/.server
WORKDIR $SERVER_DIR
COPY ./${APP_BIN} .

ENV GIN_MODE=release

CMD ./${APP_BIN}

Alpine Linux is a lightweight and secure Linux distribution that is particularly well-suited for containerized environments, embedded systems, and resource-constrained environments where efficiency and security are paramount.

With this Dockerfile, we‘re ready to run it with Elasticsearch in the Docker Compose.