chore: update devcontainer, deploy config and docs for Django Redis Postgres sample

Author: raphaeltm

samples/crew-django-redis-postgres/.devcontainer/Dockerfile

@@ -1,12 +1 @@
-# Note: universal image is not compatible with the devcontainer tools.
-#       we use the typescript-node image instead here but should switch out per 
-#       project requirements. You can choose a devcontainer that's appropriate 
-#       for your sample from the list below #REMOVE_ME_AFTER_EDITING
-
-# FROM mcr.microsoft.com/devcontainers/go:1.22-bookworm
-# FROM mcr.microsoft.com/devcontainers/python:3.12-bookworm
-# FROM mcr.microsoft.com/devcontainers/php:8.3-bookworm
-# FROM mcr.microsoft.com/devcontainers/ruby:3.2-bookworm
-# FROM mcr.microsoft.com/devcontainers/java:11-bookworm
-# FROM mcr.microsoft.com/devcontainers/rust:1-bookworm
-FROM mcr.microsoft.com/devcontainers/typescript-node:22-bookworm
+FROM mcr.microsoft.com/devcontainers/python:3.12-bookworm

samples/crew-django-redis-postgres/.github/workflows/deploy.yaml

@@ -19,10 +19,9 @@ jobs:
 
     - name: Deploy
       uses: DefangLabs/[email protected]
-      #REMOVE_ME_AFTER_EDITING - Replace the following line with the list of environment variables you want to pass to the action
-      # or remove the lines if you don't need to pass any environment variables/secrets to the action
       with:
-        config-env-vars: ENV1 ENV2
+        config-env-vars: DJANGO_SECRET_KEY POSTGRES_PASSWORD SSL_MODE
       env:
-        ENV1: ${{ secrets.ENV1 }}
-        ENV2: ${{ secrets.ENV2 }}
+        DJANGO_SECRET_KEY: ${{ secrets.DJANGO_SECRET_KEY }}
+        POSTGRES_PASSWORD: ${{ secrets.POSTGRES_PASSWORD }}
+        SSL_MODE: ${{ secrets.SSL_MODE }}

samples/crew-django-redis-postgres/README.md

@@ -19,7 +19,6 @@ docker compose -f ./compose.local.yaml up --build
 ```
 
 ## Configuration
-#REMOVE_ME_AFTER_EDITING - this section should be removed if there are no configuration values needed. The intro text can probably stay, but the list of configuration values should be updated/removed if there are none.
 
 For this sample, you will need to provide the following [configuration](https://docs.defang.io/docs/concepts/configuration):