feat: enhance environment variable handling for shell commands

- Added `prepareEnvironmentVariablesForShell` function to properly escape environment variables for shell usage.
- Updated various builders (Docker, Heroku, Nixpacks, Paketo, Railpack) to utilize the new function for improved handling of special characters in environment variables.
- Introduced tests to validate the handling of environment variables with various special characters, ensuring robustness in shell command execution.
- Added `shell-quote` dependency to manage quoting of shell arguments effectively.

packages/server/src/utils/builders/compose.ts

@@ -2,6 +2,7 @@ import { dirname, join } from "node:path";
 import { paths } from "@dokploy/server/constants";
 import type { InferResultType } from "@dokploy/server/types/with";
 import boxen from "boxen";
+import { quote } from "shell-quote";
 import { writeDomainsToCompose } from "../docker/domain";
 import {
 	encodeBase64,
@@ -137,7 +138,7 @@ const getExportEnvCommand = (compose: ComposeNested) => {
 		compose.environment.project.env,
 	);
 	const exports = Object.entries(envVars)
-		.map(([key, value]) => `export ${key}=${JSON.stringify(value)}`)
+		.map(([key, value]) => `export ${key}=${quote([value])}`)
 		.join("\n");
 
 	return exports ? `\n# Export environment variables\n${exports}\n` : "";