add golangci config with basic rules

.golangci.yml

@@ -0,0 +1,20 @@
+linters:
+  enable:
+    - errcheck
+    - gosimple
+    - govet
+    - ineffassign
+    - staticcheck
+    - unused
+    - forbidigo
+
+linters-settings:
+  forbidigo:
+    # Forbid the following identifiers (list of regexp).
+    # Default: ["^(fmt\\.Print(|f|ln)|print|println)$"]
+    forbid:
+      # Builtin function:
+      - ^print.*$
+      # Optional message that gets included in error reports.
+      - p: ^fmt\.Print.*$
+        msg: Do not commit print statements.