Add contributor guide

.goreleaser.yml

@@ -33,19 +33,6 @@ brew:
     email: mikeswcho@gmail.com
   homepage: https://dnote.io
   description: Capture your learning without leaving the command line
-  dependencies:
-    - go
-    - dep
-  install: |
-    ENV["GOPATH"] = buildpath
-
-    (buildpath/"src/github.com/dnote/cli").install buildpath.children
-    cd "src/github.com/dnote/cli" do
-      system "dep", "ensure"
-      system "go", "build", "-ldflags", "-X main.apiEndpoint=https://api.dnote.io", "-o", bin/"dnote"
-    end
-  test: |
-    system "${bin}/dnote --version"
 
 changelog:
   sort: asc

CONBTRIBUTING.md

@@ -0,0 +1,42 @@
+# Contributing
+
+This is a guide for contributors.
+
+## Set up
+
+First, download the project
+
+```sh
+go get github.com/dnote/cli
+```
+
+Go to the project root and download dependencies using [dep](https://github.com/golang/dep).
+
+```sh
+dep ensure
+```
+
+## Test
+
+Run
+
+```sh
+./scripts/test.sh
+```
+
+## Release
+
+This project uses [goreleaser](https://github.com/goreleaser/goreleaser) to automate the release process.
+
+The following will tag, push the tag, create release on GitHub, build artifacts, upload them, and
+push a commit to [Dnote Homebrew tap](https://github.com/dnote/homebrew-dnote).
+
+```sh
+VERSION=v0.4.2 make
+```
+
+**Note**
+
+- If a release is not stable,
+  - disable the homebrew release by commenting out `homebrew` block in `.goreleaser.yml`
+  - mark release as pre-release on GitHub release