chore: clean up environment variable usage and formatting in configuration files

- Updated docker-compose.yaml to use double quotes for version and port mappings.
- Removed DEPLOYMENT_PROVIDER from global environment variables in turbo.json and Dockerfile.
- Adjusted dashboard build command in package.json to remove DEPLOYMENT_PROVIDER.
- Cleaned up .env.example by removing the DEPLOYMENT_PROVIDER comment.
- Simplified SvelteKit adapter condition in svelte.config.js.

turbo.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://turborepo.org/schema.json",
-  "globalEnv": ["PUBLIC_IS_SELFHOSTED", "DEPLOYMENT_PROVIDER"],
+  "globalEnv": ["PUBLIC_IS_SELFHOSTED"],
   "pipeline": {
     "@cio/dashboard#build": {
       "dependsOn": ["@cio/api#build"]