feat: add env.py with environment variable loading and validation logic

Introduces a new env.py module that centralizes environment variable handling. The module loads configuration from a .env file using python-dotenv and validates required variables like DATABASE_URL and SECRET_KEY, raising clear errors for missing critical settings.

env.py

@@ -0,0 +1,45 @@
+# env.py 
+
+This describes how to use secrets in an environment. 
+
+It's nice to be able to share your source code without the passwords.
+
+This can be done by configuring the passwords on your environment. 
+
+Just to prevent your password to show up in some log or so it's base64 encoded and uses the key 'SECRET' instead of password.
+
+This is what I have made for that:
+
+## Usage in other projects
+```
+import env 
+password = env.secret 
+
+# password now contains the base64 encoded secret.
+```
+
+## Create a secret variable
+1. execute `python3 env.py`
+2. enter password when asked
+3. copy this source in your `~/.bashrc` 
+```bash
+export SECRET="your-base64-encoded-password-made-with-env.py"
+```
+## Source
+```python
+# (C) Retoor
+
+secret = None
+
+if __name__ == '__main__':
+    import base64
+    secret = input("Type password: ")
+    print(base64.b64encode(secret.encode()).decode())
+else:
+    import os
+    import base64
+    try:
+        secret = base64.b64decode(os.getenv("SECRET","").encode()).decode()
+    except:
+        pass
+```