fix: allow load config file

Makefile

@@ -0,0 +1,19 @@
+BINARY_DIR=bin
+BINARY_NAME=webhook-listener
+COVERAGE_DIR=coverage
+
+lint:
+	golangci-lint run ./...
+goreportcard:
+	goreportcard-cli -v
+test: 
+	go test ./...
+test-coverage:
+	rm -rf ${COVERAGE_DIR}
+	mkdir ${COVERAGE_DIR}
+	go test -v -coverprofile ${COVERAGE_DIR}/cover.out ./...
+	go tool cover -html ${COVERAGE_DIR}/cover.out -o ${COVERAGE_DIR}/cover.html
+build:
+	rm -rf ${BINARY_DIR}
+	mkdir ${BINARY_DIR}
+	env GOOS=linux CGO_ENABLED=0 GOARCH=amd64 go build -o ./${BINARY_DIR}/${BINARY_NAME} main.go	

main.go

@@ -15,9 +15,13 @@ import (
 )
 
 func main() {
-	// Get root path
-	_, filename, _, _ := runtime.Caller(0)
-	cfg, err := config.LoadConfig(path.Join(path.Dir(filename), "configs", "app.yml"))
+	cfgFile := os.Getenv("CONFIG_FILE")
+	if cfgFile == "" {
+		// Get root path
+		_, filename, _, _ := runtime.Caller(0)
+		cfgFile = path.Join(path.Dir(filename), "configs", "app.yml")
+	}
+	cfg, err := config.LoadConfig(cfgFile)
 	if err != nil {
 		log.Fatalf("Error loading config: %v", err)
 	}