Add Postiz configuration and environment variables

- Updated .env.example to include new environment variables for Postiz, including authentication and social media integration settings.
- Modified Caddyfile to implement basic authentication for the Postiz service.
- Enhanced docker-compose.yml to incorporate Postiz environment variables and ensure proper service configuration.
- Updated scripts to generate Postiz-related secrets and included them in the final report for user reference.

.env.example

@@ -322,3 +322,63 @@ PROMETHEUS_PASSWORD_HASH=
 SEARXNG_PASSWORD_HASH=
 COMFYUI_PASSWORD_HASH=
 RAGAPP_PASSWORD_HASH=
+
+############
+# Postiz configuration
+# Reference: https://docs.postiz.com/configuration/reference
+# To protect Postiz via Caddy basic auth (optional), set these:
+############
+
+POSTIZ_USERNAME=
+POSTIZ_PASSWORD=
+POSTIZ_PASSWORD_HASH=
+
+############
+# Postiz Social Media Integrations
+# Leave blank if not used. Provide credentials from each platform.
+############
+
+X_API_KEY=
+X_API_SECRET=
+
+LINKEDIN_CLIENT_ID=
+LINKEDIN_CLIENT_SECRET=
+
+REDDIT_CLIENT_ID=
+REDDIT_CLIENT_SECRET=
+
+GITHUB_CLIENT_ID=
+GITHUB_CLIENT_SECRET=
+
+BEEHIIVE_API_KEY=
+BEEHIIVE_PUBLICATION_ID=
+
+THREADS_APP_ID=
+THREADS_APP_SECRET=
+
+FACEBOOK_APP_ID=
+FACEBOOK_APP_SECRET=
+
+YOUTUBE_CLIENT_ID=
+YOUTUBE_CLIENT_SECRET=
+
+TIKTOK_CLIENT_ID=
+TIKTOK_CLIENT_SECRET=
+
+PINTEREST_CLIENT_ID=
+PINTEREST_CLIENT_SECRET=
+
+DRIBBBLE_CLIENT_ID=
+DRIBBBLE_CLIENT_SECRET=
+
+DISCORD_CLIENT_ID=
+DISCORD_CLIENT_SECRET=
+DISCORD_BOT_TOKEN_ID=
+
+SLACK_ID=
+SLACK_SECRET=
+SLACK_SIGNING_SECRET=
+
+MASTODON_URL=https://mastodon.social
+MASTODON_CLIENT_ID=
+MASTODON_CLIENT_SECRET=