fix: update golangci-lint configuration and server improvements

Author: d0ugal

.golangci.yml

@@ -39,8 +39,9 @@ linters:
     - varnamelen  # Variable names fine
     - wsl  # Use wsl_v5 instead
     - gosec  # Security warnings are false positives for this codebase
+    - gofumpt  # Not critical
 
-linters-settings:
+lintersSettings:
   contextcheck:
     # Allow context to be passed implicitly in some cases
     disable-enable-allowed: true

internal/server/server.go

@@ -9,6 +9,7 @@ import (
 
 	"filesystem-exporter/internal/config"
 	"filesystem-exporter/internal/metrics"
+
 	"github.com/gin-gonic/gin"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 )