doc: update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,3 +1,5 @@
+# Contributing
+
 Hello everybody! 💪
 
 Any contribution to this project is appreciated and welcomed 😎
@@ -12,3 +14,43 @@ See this [PR example](https://github.com/iamgiolaga/partitelle-bot/pull/20)
 
 Best,
 Giovanni
+
+## Init the environment
+
+To init the environment, run the following commands:
+
+```bash
+pyenv install
+pyenv local
+pip install -r requirements.txt
+```
+
+Make sure that the python version is the one specified in the `.python-version` file:
+
+```bash
+python --version
+```
+
+Create a `.env` file and fill it with the correct values. You can use the `default.env` file as a template.
+
+## Run the tests
+
+To run the tests, run the following command:
+
+```bash
+python -m unittest discover test
+```
+
+## Run the bot
+
+To run the bot, run the following command:
+
+```bash
+python main.py
+```
+
+If you're running the bot locally (ENV = local), the bot will start polling messages from Telegram.
+
+If you're running the bot on other environments (ENV != local), the bot will start a webhook listener instead.
+
+This is useful to test the bot on a local environment before pushing the changes to the remote server.

default.env

@@ -0,0 +1,8 @@
+PB_TG_TOKEN = ""
+PB_URL = ""
+PB_DB_TABLE_NAME = ""
+PB_DB_HOST = ""
+PB_DB_NAME = ""
+PB_DB_USER = ""
+PB_DB_PASSWORD = ""
+PB_DB_PORT =