Modified CONTRIBUTING.md file (#122)

Signed-off-by: Gianluca Capuzzi <gianluca.posta78@gmail.com>

Author: gcapuzzi

docs/CONTRIBUTING.md

@@ -1 +1,156 @@
 # Contributing to AIFAQ
+
+## Introduction
+
+AIFAQ is an open-source project under Linux Foundation Decentralized Trust umbrella. It aims to build an AI Chatbot to support newby in communities (companies, organizations, individuals, …).
+This guide allows the AIFAQ community to contribute activities. Please, read before starting coding.
+
+## Prerequisites
+
+Join the [weekly meetings](https://zoom-lfx.platform.linuxfoundation.org/meeting/96156160446?password=436922cc-9811-4e05-aa60-04f7b4679c7e) on Monday at 9 am EST time zone.
+
+## Code of Conduct and Antitrust Policy
+
+- [Linux Foundation Privacy Policy](https://www.linuxfoundation.org/legal/privacy-policy)
+- [Terms of use](https://www.linuxfoundation.org/legal/terms)
+- [Antitrust Policy](https://www.linuxfoundation.org/legal/antitrust-policy)
+- [Code of Conduct](https://www.lfdecentralizedtrust.org/code-of-conduct)
+
+## GitHub Flow
+
+Please select a task from the [published issues](https://github.com/hyperledger-labs/aifaq/issues); other changes will not be considered. For improvement proposals, kindly attend the [Monday meetings](https://zoom-lfx.platform.linuxfoundation.org/meeting/96156160446?password=436922cc-9811-4e05-aa60-04f7b4679c7e).
+Below the GitHub tree:
+
+<img src="../images/github_tree.png" alt="GitHub tree"/>
+
+and the workflow schema:
+
+<img src="../images/workflow.png" alt="GitHub workflow"/>
+
+We should document all changes describing the solution and adding screenshots or a short video (like [this](https://github-production-user-asset-6210df.s3.amazonaws.com/190102379/461524193-6ee9ee0c-2cd1-4ab3-97ea-904515cd5b6c.webm?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAVCODYLSA53PQK4ZA%2F20250704%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20250704T111312Z&X-Amz-Expires=300&X-Amz-Signature=e9ba00009ffd4bd997e34a62a5a5ff647e845bd7786790c495318de77b446737&X-Amz-SignedHeaders=host)).
+
+## Commands
+
+In your local PC, create a new folder and open it in VS Code.
+Then open a new terminal:
+
+<img src="../images/new_terminal.png" alt="VS Code new terminal"/>
+
+go to [AIFAQ GitHub repo agents branch](https://github.com/hyperledger-labs/aifaq/tree/agents) and press on fork button:
+
+<img src="../images/fork_button.png" alt="GitHub fork button"/>
+
+uncheck that checkbox and press on create fork button:
+
+<img src="../images/create_fork.png" alt="GitHub create fork"/>
+
+it will create a fork in your local GitHub space.
+
+<img src="../images/copy_url.png" alt="GitHub copy url repo"/>
+
+Then click on the code button and copy the https url to clipboard:
+
+Now, type
+
+```console
+git clone https://github.com/gcapuzzi/aifaq.git
+```
+
+on vs code terminal:
+
+<img src="../images/git_clone.png" alt="git clone terminal command"/>
+
+now we can move to the aifaq folder:
+
+```console
+cd aifaq
+```
+
+and list the current branches:
+
+```console
+git branch -a
+```
+
+<img src="../images/git_branch_a.png" alt="git branch -a terminal command"/>
+
+we can see that the current branch is **main** and it refers to the **remote main branch**.
+But, we want to change a different branch (in our case, mvt-streamlit branch) so execute:
+
+```console
+git checkout origin/mvt-streamlit
+```
+
+<img src="../images/git_checkout_origin.png" alt="git checkout origin terminal command"/>
+
+and execute
+
+```console
+git branch -a
+```
+
+in order to check the current remote branch.
+
+Ok, now we can create a new local branch with same name:
+
+```console
+git checkout mvt-streamlit
+```
+
+<img src="../images/git_checkout.png" alt="git checkout terminal command"/>
+
+and
+
+<img src="../images/git_branch2.png" alt="git branch terminal command"/>
+
+and now we can do our dev activities.
+In my case, I want to add a new file (faiss_content_py) with copy-paste.
+When I finish my changes, type:
+
+```console
+git status
+```
+
+<img src="../images/git_status.png" alt="git status terminal command"/>
+
+so, we have to commit our changes before to push those to the remote branch:
+
+```console
+git add -A
+git commit -s -m “Added faiss_content.py file”
+```
+
+<img src="../images/git_add_commit.png" alt="git add commit terminal command"/>
+
+The first command adds the changes to the commit and the second one executes the commit (please check the ‘-s’ argument that is mandatory in Linux Foundation).
+
+Now, we can push the code to the remote branch:
+
+```console
+git push -u origin mvt-streamlit
+```
+
+<img src="../images/git_push_origin.png" alt="git push origin terminal command"/>
+
+now if we check our mvt-streamlit branch in the personal GitHub space:
+
+<img src="../images/mvt_streamlit.png" alt="mvt-streamlit GitHub branch"/>
+
+## Pull Request
+
+The changes are in our GitHub space, but we want the same in the official project repo. So open a **Pull Request**:
+
+<img src="../images/new_pull_request.png" alt="GitHub new pull request"/>
+
+and set up the two branches:
+
+<img src="../images/select_branches.png" alt="GitHub new pull request select branches"/>
+
+then click on **Create pull request button**:
+
+<img src="../images/open_pull_request.png" alt="GitHub open pull request"/>
+
+Please add a short description and click on the **Create pull request button**.
+And remove the branch:
+
+<img src="../images/remove_branch.png" alt="GitHub remove branch"/>