Add documentation for configuring flask secret key

[alok760]

I'm submitting a ... (check one with "x")

• bug report
• feature request
• support request => Please do not submit support requests here, instead ask your query in out Gitter channel at https://gitter.im/fossasia/meilix

Actual Behaviour
There is no documentation for configuring flask secret key.

Expected Behaviour

• Add documentation for configuring flask secret key using environment variables on Local, Heroku and Docker.

Related code:

meilix-generator/app.py

Lines 25 to 26 in 35a2bb7

	# Initializing flask secret key using the environment variable "secret_key"
	app.secret_key = os.environ.get('secret_key', 'z528&^FJjhd_t2bxc#$2').encode()

[pranav1698]

It would be great if this could be hidden

[xeon-zolt]

the original secrete key is different

[pranav1698]

Also, I think this would require admin rights from the heroku server but you can test it for your local development

[xeon-zolt]

i have already changed it

[Patil2099]

Can I work on this ? If yes can you explain how to add something to documentation.
Also # Initializing flask secret key using the environment variable "secret_key"
app.secret_key = os.environ.get('secret_key', 'z528&^FJjhd_t2bxc#$2').encode()
what is the second argument here? @alok760

[alok760]

@Patil2099 the second argument is the default value. To change the secret key, you need to set an environment variable secret_key. You already need to set your Travis Key as an env variable, similarly, you need to set the flask secret key.