add help to contribute to the project

Author: geoco84

doc/contributing/fork.md

@@ -0,0 +1,66 @@
+# Contributing on project
+
+## Fork repository
+
+1. Go to https://github.com/comodit/comodit-client
+2. Fork project in your repository 
+3. Clone forked project in your laptop 
+4. Configure remote project
+ 
+        $ git remote add upstream  https://github.com/comodit/comodit-client.git
+
+more information [GitHub help](https://docs.github.com/en/get-started/quickstart/fork-a-repo)
+
+
+## Create new branch for feature or fixed
+
+> if you cloned your repository not now. Read before Retrieve change from source project
+
+Create branch
+
+        $ git checkout -b branchName
+
+Commit changes
+
+        $ git commit -am "description of change"
+
+Push changes
+
+        $ git push origin <branch_name>
+
+## Create PullRequest
+
+1. Go to https://github.com/<REPO_NAME>/comodit-client/branches
+
+#### ![pullRequest](./image/pr.png)
+
+2. Click to create "New pull request"
+
+#### ![setting](./image/setting.png)
+
+In GitHub flow, Pull request merge directly in branch master of source project
+
+3. Click on create button "Create pull request"
+4. Verify your change
+5. Ask to someone to verify your change and accept the pull request
+
+more information [GitHub help](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request#changing-the-branch-range-and-destination-repository)
+
+
+## Accept PullRequest with squash
+
+When you accept the change, select and merge and push on it.
+
+This option create only one commit with all your commit and you can write a description for details.
+Now your change it's on branch master of comodit-client repository 
+### ![squash](./image/squash.png)
+
+
+## Retrieve change from source project
+
+      $ git checkout master
+      $ git fetch upstream
+      $ git rebase upstream/master
+
+
+