add golang-ci configuration

.golangci.yml

@@ -0,0 +1,20 @@
+linters:
+  enable:
+    - gocyclo
+    - golint
+    - misspell  
+  disable:
+    - structcheck # too many false positives
+
+linters-settings:
+  gocyclo:
+    # minimal code complexity to report, 30 by default (but we recommend 10-20)
+    min-complexity: 20
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+    - SA5008 # ignore staticcheck for go-flags