chore: initialize with golang requirements

- Add CI/CD
- Add linter
- Add Makefile
- Add Dockerfile

Signed-off-by: Rodney Osodo <socials@rodneyosodo.com>

.github/workflows/cd.yaml

@@ -0,0 +1,47 @@
+name: Create and publish Docker image
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "v*"
+    paths:
+      - ".github/workflows/cd.yaml"
+      - "**.go"
+
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Fetch tags for the build
+        run: |
+          git fetch --prune --unshallow --tags
+
+      - name: Set up Docker Build
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        run: |
+          make docker-push

.github/workflows/ci.yaml

@@ -0,0 +1,43 @@
+name: Continuous Integration
+
+on:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - ".github/workflows/ci.yaml"
+      - "**.go"
+
+  push:
+    branches:
+      - main
+    paths:
+      - ".github/workflows/ci.yaml"
+      - "**.go"
+
+  workflow_dispatch:
+
+jobs:
+  lint-and-build:
+    name: Lint and Build
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.23.x
+          cache-dependency-path: "go.sum"
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: v1.61.0
+          args: --config ./.golangci.yaml
+
+      - name: Build
+        run: |
+          make all

.gitignore

@@ -23,3 +23,6 @@ go.work.sum
 
 # env file
 .env
+
+# Build
+build

.golangci.yaml

@@ -0,0 +1,32 @@
+run:
+  timeout: 3m
+
+issues:
+  max-issues-per-linter: 100
+  max-same-issues: 100
+
+linters-settings:
+  gocritic:
+    enabled-tags:
+      - diagnostic
+      - performance
+      - style
+      - experimental
+      - opinionated
+
+linters:
+  enable-all: true
+  disable:
+    - execinquery # deprecated
+    - gomnd # deprecated
+    - exportloopref # deprecated
+    - depguard
+    - exhaustruct
+    - ireturn
+    - funlen
+    - varnamelen
+    - wrapcheck
+    - wsl
+    - nonamedreturns
+    - cyclop
+    - errorlint

Makefile

@@ -0,0 +1,63 @@
+CGO_ENABLED ?= 0
+GOOS ?= $(shell go env GOOS)
+GOARCH ?= $(shell go env GOARCH)
+GOARM ?= $(shell go env GOARM)
+
+BUILD_DIR ?= ./build
+SVC = gophercon
+DOCKER_IMAGE_NAME ?= ghcr.io/rodneyosodo/gophercon
+VERSION ?= $(shell git describe --abbrev=0 --tags 2>/dev/null || echo 'v0.0.0')
+
+define compile_service
+	CGO_ENABLED=$(CGO_ENABLED) GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM) \
+	go build -ldflags "-s -w " -o ${BUILD_DIR}/$(SVC) cmd/main.go
+endef
+
+define make_docker
+	docker build \
+		--build-arg SVC=$(SVC) \
+		--no-cache \
+		--tag=$(DOCKER_IMAGE_NAME):$(VERSION) \
+		--tag=$(DOCKER_IMAGE_NAME):latest \
+		-f docker/Dockerfile .
+endef
+
+define docker_push
+	docker push $(DOCKER_IMAGE_NAME):$(VERSION)
+	docker push $(DOCKER_IMAGE_NAME):latest
+endef
+
+.PHONY: build
+build:
+	@mkdir -p ${BUILD_DIR}
+	$(call compile_service)
+
+.PHONY: clean
+clean:
+	rm -rf ${BUILD_DIR}
+
+.PHONY: docker
+docker: build
+	$(call make_docker)
+
+.PHONY: docker-push
+docker-push: docker
+	$(call docker_push)
+
+.PHONY: lint
+lint:
+	golangci-lint run  --config .golangci.yaml
+
+.PHONY: all
+all: build docker
+
+.PHONY: help
+help:
+	@echo "Makefile for gophercon"
+	@echo "Usage:"
+	@echo "  make build - Build the binary"
+	@echo "  make docker - Build the docker image"
+	@echo "  make docker-push - Push the docker image"
+	@echo "  make lint - Lint the code"
+	@echo "  make all - Build the binary and docker image"
+	@echo "  make clean - Clean the build directory"

cmd/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "log"
+
+func main() {
+	log.Println("Hello World")
+}

docker/Dockerfile

@@ -0,0 +1,14 @@
+FROM golang:1.23-alpine AS builder
+ARG SVC
+WORKDIR /go/src/github.com/rodneyosodo/gophercon
+COPY . .
+RUN apk update \
+    && apk add make\
+    && make build \
+    && mv build/${SVC} /exe
+
+FROM scratch
+LABEL org.opencontainers.image.source=https://github.com/rodneyosodo/gophercon-africa-2024
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+COPY --from=builder /exe /
+ENTRYPOINT ["/exe"]

go.mod

@@ -0,0 +1,3 @@
+module github.com/rodneyosodo/gophercon
+
+go 1.23.2