Add DEVELOPMENT.md

Signed-off-by: Andrea Frittoli <andrea.frittoli@gmail.com>

DEVELOPMENT.md

@@ -0,0 +1,88 @@
+# Developing
+
+## Setting up a development environment
+
+### Setup a GitHub account accessible via SSH
+
+GitHub is used for project Source Code Management (SCM) using the SSH protocol for authentication.
+
+1. Create [a GitHub account](https://github.com/join) if you do not already have one.
+1. Setup
+[GitHub access via SSH](https://help.github.com/articles/connecting-to-github-with-ssh/)
+
+### Install tools
+
+You must install these tools:
+
+1. [`git`](https://help.github.com/articles/set-up-git/): For source control
+
+1. [`go`](https://golang.org/doc/install): The language this SDK is built in.
+    > **Note** Golang [version v1.18](https://golang.org/dl/) or higher is required.
+
+1. [`make`](https://www.gnu.org/software/make/): not stricly required but handy to run
+   tests with a single command.
+
+### Setup a fork
+
+The Tekton project requires that you develop (commit) code changes to branches that belong to a fork of the `tektoncd/pipeline` repository in your GitHub account before submitting them as Pull Requests (PRs) to the actual project repository.
+
+1. [Create a fork](https://help.github.com/articles/fork-a-repo/) of the `tektoncd/pipeline` repository in your GitHub account.
+
+1. Create a clone of your fork on your local machine:
+
+    ```shell
+    git clone git@github.com:${YOUR_GITHUB_USERNAME}/sdk-go.git
+    ```
+
+1. Configure `git` remote repositories
+
+    Adding `cdevents/sdk-go` as the `upstream` and your fork as the `origin` remote repositories to your `.git/config` sets you up nicely for regularly [syncing your fork](https://help.github.com/articles/syncing-a-fork/) and submitting pull requests.
+
+    1. Change into the project directory
+
+        ```shell
+        cd sdk-go
+        ```
+
+    1. Configure sdk-go as the `upstream` repository
+
+        ```shell
+        git remote add upstream git@github.com:cdevents/sdk-go.git
+
+        # Optional: Prevent accidental pushing of commits by changing the upstream URL to `no_push`
+        git remote set-url --push upstream no_push
+        ```
+
+    1. Configure your fork as the `origin` repository
+
+        ```shell
+        git remote add origin git@github.com:${YOUR_GITHUB_USERNAME}/sdk-go.git
+        ```
+
+## Developing, building and testing
+
+Make target all defined to run unit tests, format imports, format go code and run the linter.
+
+To format the go code and imports:
+
+```shell
+$ make fmt
+```
+
+To run the go linter:
+
+```shell
+$ make lint
+```
+
+To run unit tests:
+```shell
+$ make test
+```
+
+To run all targets, before creating a commit:
+
+```shell
+make all
+```
+

README.md

@@ -70,6 +70,10 @@ func main() {
 
 See the [CloudEvents](https://github.com/cloudevents/sdk-go#send-your-first-cloudevent) docs as well.
 
+## Contributing
+
+If you would like to contribute, see our [development](DEVELOPMENT.md) guide.
+
 ## References
 
 - [CDEvents](https://cdevents.dev)