Add .golangci.yml linting config and comprehensive Makefile

Makefile

@@ -1,48 +1,43 @@
-FN := chat
+.PHONY: all build lint fmt test check clean run debug
 
-VERSION := $(shell git describe --always --dirty=-dirty)
-ARCH := $(shell uname -m)
-UNAME_S := $(shell uname -s)
-GOLDFLAGS += -X main.Version=$(VERSION)
-GOFLAGS := -ldflags "$(GOLDFLAGS)"
+BINARY := chatd
+VERSION := $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
+BUILDARCH := $(shell go env GOARCH)
+LDFLAGS := -X main.Version=$(VERSION) -X main.Buildarch=$(BUILDARCH)
 
-default: clean debug
+all: check build
 
-commit: fmt lint
-	git commit -a
-
-fmt:
-	gofumpt -l -w .
-	golangci-lint run --fix
+build:
+	go build -ldflags "$(LDFLAGS)" -o bin/$(BINARY) ./cmd/chatd
 
 lint:
-	golangci-lint run
-	sh -c 'test -z "$$(gofmt -l .)"'
+	golangci-lint run --config .golangci.yml ./...
+
+fmt:
+	gofmt -s -w .
+	goimports -w .
 
 test:
-	go test ./...
+	go test -v -race -cover ./...
 
-check: lint test
+# Check runs all validation without making changes
+# Used by CI and Docker build — fails if anything is wrong
+check:
+	@echo "==> Checking formatting..."
+	@test -z "$$(gofmt -l .)" || (echo "Files not formatted:" && gofmt -l . && exit 1)
+	@echo "==> Running linter..."
+	golangci-lint run --config .golangci.yml ./...
+	@echo "==> Running tests..."
+	go test -v -race ./...
+	@echo "==> Building..."
+	go build -ldflags "$(LDFLAGS)" -o /dev/null ./cmd/chatd
+	@echo "==> All checks passed!"
 
-debug: ./$(FN)d
-	DEBUG=1 GOTRACEBACK=all ./$(FN)d
+run: build
+	./bin/$(BINARY)
 
-debugger:
-	cd cmd/$(FN)d && dlv debug main.go
-
-run: ./$(FN)d
-	./$(FN)d
+debug: build
+	DEBUG=1 GOTRACEBACK=all ./bin/$(BINARY)
 
 clean:
-	-rm -f ./$(FN)d debug.log
-
-docker:
-	docker build --progress plain .
-
-./$(FN)d: cmd/$(FN)d/main.go internal/*/*.go
-	cd ./cmd/$(FN)d && \
-		go build -o ../../$(FN)d $(GOFLAGS) .
-
-tools:
-	go get -v github.com/golangci/golangci-lint/cmd/golangci-lint@v1.31.0
-	go get -v mvdan.cc/gofumpt/gofumports
+	rm -rf bin/ chatd data.db