adds .golangci.yml, updates Makefile

.golangci.yml

@@ -0,0 +1,21 @@
+run:
+  timeout: 30m
+
+linters:
+  disable-all: true
+  enable:
+    - govet
+    - staticcheck
+    - unused
+    - gosimple
+    - structcheck
+    - varcheck
+    - ineffassign
+    - deadcode
+    - golint
+    - unconvert
+    - goimports
+    - maligned
+    - unparam
+    - prealloc
+    - scopelint

Makefile

@@ -3,20 +3,4 @@
 SOURCE_FOLDERS := $(shell go list -f {{.Dir}} ./...)
 
 lint:
-	golangci-lint run --deadline=30m --disable-all \
-	--enable=govet \
-	--enable=staticcheck \
-	--enable=unused \
-	--enable=gosimple \
-	--enable=structcheck \
-	--enable=varcheck \
-	--enable=ineffassign \
-	--enable=deadcode \
-	--enable=golint \
-	--enable=unconvert \
-	--enable=goimports \
-	--enable=maligned \
-	--enable=unparam \
-	--enable=prealloc \
-	--enable=scopelint \
-	./...
+	golangci-lint run ./...