docs: remove unsafe source secret examples

.env.example

@@ -1,16 +1,16 @@
 # Since .env is gitignored, you can use .env.example to build a new `.env` file when you clone the repo.
-# Keep this file up-to-date when you add new variables to \`.env\`.
+# Keep this file up-to-date when you add new variables to `.env`.
 
 # This file will be committed to version control, so make sure not to have any secrets in it.
 # If you are cloning this repo, create a copy of this file named `.env` and populate it with your secrets.
 
-# The below secret is not used anywhere but required for Auth.js (Would encrypt JWTs and Mail hashes, both not used)
-AUTH_SECRET="supersecret"
+# Generate two different 64-character hex values with `openssl rand -hex 32` before starting Homarr.
+# Never reuse these values or commit the populated `.env` file.
+AUTH_SECRET=
 
 # The below secret is used to encrypt integration secrets in the database.
-# It should be a 32-byte string, generated by running `openssl rand -hex 32` on Unix
-# or starting the project without any (which will show a randomly generated one).
-SECRET_ENCRYPTION_KEY=0000000000000000000000000000000000000000000000000000000000000000
+# Homarr will reject an empty or invalid value and print a randomly generated candidate.
+SECRET_ENCRYPTION_KEY=
 
 LOG_LEVEL='info'
 

apps/docs/docs/getting-started/installation/source.mdx

@@ -43,9 +43,9 @@ This method is only useful, when you want to develop on Homarr or extend it with
     `DB_URL='/home/username/homarr/db.sqlite'` if you want to store the database elsewhere.
   </li>
   <li>
-    Replace `AUTH_SECRET` and `SECRET_ENCRYPTION_KEY` both with a secure random string by using `openssl rand -hex 32`
+    Run `openssl rand -hex 32` twice and set `AUTH_SECRET` and `SECRET_ENCRYPTION_KEY` to the two different generated
+    values. Keep both values secret and preserve `SECRET_ENCRYPTION_KEY` with your backups.
   </li>
-  <li>Replace `CRON_JOB_API_KEY` with a secure random string by using `openssl rand -base64 32`</li>
   <li>Run `pnpm run db:migration:sqlite:run` and wait that it completes</li>
   <li>Build the source using `pnpm build`</li>
   <li>