chore: setup golangci-lint config file

Signed-off-by: Matthieu MOREL <[email protected]>

.golangci.yaml

@@ -0,0 +1,16 @@
+issues:
+  max-same-issues: 0
+linters:
+  disable-all: true
+  enable: # please keep this alphabetized
+    - errcheck
+    - gofmt
+    - goimports
+    - gosimple
+    - govet
+    - ineffassign
+    - staticcheck
+    - unused
+linters-settings: # please keep this alphabetized
+  goimports:
+    local-prefixes: go.etcd.io # Put imports beginning with prefix after 3rd-party packages.