chore: add golangci config

.golangci.yml

@@ -0,0 +1,23 @@
+---
+run:
+  timeout: 3m
+linters:
+  enable:
+    - bodyclose
+    - exportloopref
+    - gofmt
+    - gosec
+    - govet
+    - misspell
+    - noctx
+    - staticcheck
+    - unconvert
+    - unparam
+    - whitespace
+issues:
+  max-same-issues: 0
+linters-settings:
+  goimports:
+    local-prefixes: github.com/jakekeeys/hg612-exporter
+  misspell:
+    locale: US