This is a small Python application, designed for the Deta platform, that will manage my blog's Newsletter. If you would rather host this yourself via Docker, or on Heroku via Docker, you still need a Deta Base, which is a small NoSQL Database. You can sign up here and get 2GB of storage for free.
I needed a simple way to have users sign up to my email subscription, and this method allows me host it myself (or rather have someone else host it for me). I can also set up the form on my own web page, and just send a Form POST request to the /subscribe endpoint and it will return a relative redirect to /confirmation if successful.
The .env file has four attributes: SENDGRID_API_KEY, SENDGRID_SEND_EMAIL, API_KEY, and BASE_URL.
SENDGRID_API_KEYis your API key for the SendGrid platform to send emails.SENDGRID_SEND_EMAILis the email from which your emails will be coming from. SendGrid will walk you through setting this up on your account.API_KEYis a password so bots can't use the/new_postendpoint as that's just for you. You can pass it with the headerX-Api-Key.BASE_URLis the base URL of the application. This is usually a DNS record preceded byhttps://.
After you've created your Deta Micro and populated these attributes in the file .env, you can upload them to your project with deta update -e .env.
If you would rather use Heroku, you can host this application with the Dockerfile. You will have to set all of the variables found in the .env file as Config Vars on Heroku, as well as the additional variable DETA_PROJECT_KEY with your Deta Project Key, which is used to access the Deta Base. More information on how to set up your Deta Base can be found here.