feat: implement custom Docker image update functionality in server settings

- Added support for pulling and updating the server with a custom Docker image URL.
- Introduced new state management for custom updates in the UpdateServer component.
- Updated API to handle optional image URL input for server updates.

packages/server/src/services/settings.ts

@@ -21,12 +21,13 @@ export const getDokployImageTag = () => {
 	return process.env.RELEASE_TAG || "latest";
 };
 
-export const getDokployImage = () => {
-	return `dokploy/dokploy:${getDokployImageTag()}`;
+export const getDokployImage = (customImage?: string) => {
+	return customImage || `dokploy/dokploy:${getDokployImageTag()}`;
 };
 
-export const pullLatestRelease = async () => {
-	const stream = await docker.pull(getDokployImage());
+export const pullRelease = async (customImage?: string) => {
+	const imageToPull = getDokployImage(customImage);
+	const stream = await docker.pull(imageToPull);
 	await new Promise((resolve, reject) => {
 		docker.modem.followProgress(stream, (err, res) =>
 			err ? reject(err) : resolve(res),
@@ -34,6 +35,17 @@ export const pullLatestRelease = async () => {
 	});
 };
 
+/** Pulls a custom Docker image and returns whether it was successful */
+export const pullCustomImage = async (imageUrl: string): Promise<boolean> => {
+	try {
+		await pullRelease(imageUrl);
+		return true;
+	} catch (error) {
+		console.error("Error pulling custom image:", error);
+		return false;
+	}
+};
+
 /** Returns Dokploy docker service image digest */
 export const getServiceImageDigest = async () => {
 	const { stdout } = await execAsync(