Feat/concurrent deployments in memory queue (#4645)

* feat: add builds concurrency management for servers

- Introduced a new `BuildsConcurrency` component to manage the number of concurrent builds for both local and remote servers, gated by license validity.
- Implemented backend logic to resolve effective builds concurrency based on server settings and organization licenses.
- Added unit tests for concurrency resolution logic to ensure correct behavior under various licensing scenarios.
- Updated database schema to include `buildsConcurrency` field for servers and web server settings.
- Refactored deployment queue to support in-memory job processing with configurable concurrency limits.

This feature enhances deployment flexibility and control for enterprise users.

* refactor: enhance deployment cancellation logic and improve Railpack build isolation

- Reintroduced the `initCancelDeployments` function in the server initialization sequence to ensure deployments can be canceled effectively.
- Updated the Railpack build command to use a unique builder name for each build, preventing conflicts during concurrent deployments.
- Enhanced the cancellation logic to reset application and compose statuses to "idle" after canceling running deployments, improving system reliability.

* test: add buildsConcurrency setting to server configuration tests

- Introduced a new `buildsConcurrency` property in the server configuration tests to ensure proper handling of concurrent builds in deployment scenarios.

* feat: implement builds concurrency management and validation

- Added `assertBuildsConcurrencyAllowed` function to validate concurrency settings based on license status.
- Updated `resolveBuildsConcurrency` to reflect new concurrency limits for free and enterprise tiers.
- Enhanced `BuildsConcurrency` component to manage concurrent builds for servers, with UI adjustments for better user experience.
- Introduced a new settings page for managing concurrent builds across servers, ensuring proper handling of deployments.
- Updated database schema to support increased maximum concurrency values for servers and web server settings.

apps/dokploy/components/dashboard/settings/servers/actions/builds-concurrency.tsx

@@ -0,0 +1,122 @@
+import { useEffect, useState } from "react";
+import { toast } from "sonner";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { api } from "@/utils/api";
+
+// Free tier may set up to 2 concurrent builds; enterprise unlocks more.
+const FREE_MAX_CONCURRENCY = 2;
+const ENTERPRISE_MAX_CONCURRENCY = 100;
+
+interface Props {
+	/**
+	 * When provided, configures concurrency for that remote server. When
+	 * omitted, configures the local Dokploy web server.
+	 */
+	serverId?: string;
+	/** Optional title override (e.g. the server name in a list). */
+	label?: string;
+}
+
+/**
+ * Control to set the number of concurrent builds, either for a remote server
+ * (`serverId` provided) or the local web server (omitted). Available to
+ * everyone self-hosted up to FREE_MAX_CONCURRENCY; higher values require a
+ * valid enterprise license. Not shown in cloud.
+ */
+export const BuildsConcurrency = ({ serverId, label }: Props) => {
+	const { data: isCloud } = api.settings.isCloud.useQuery();
+	const { data: haveValidLicense } =
+		api.licenseKey.haveValidLicenseKey.useQuery();
+
+	const serverQuery = api.server.one.useQuery(
+		{ serverId: serverId ?? "" },
+		{ enabled: !!serverId },
+	);
+	const webServerQuery = api.settings.getWebServerSettings.useQuery(undefined, {
+		enabled: !serverId,
+	});
+
+	const current = serverId
+		? serverQuery.data?.buildsConcurrency
+		: webServerQuery.data?.buildsConcurrency;
+	const refetch = serverId ? serverQuery.refetch : webServerQuery.refetch;
+
+	const updateServer = api.server.updateBuildsConcurrency.useMutation();
+	const updateWebServer = api.settings.updateBuildsConcurrency.useMutation();
+	const isPending = serverId
+		? updateServer.isPending
+		: updateWebServer.isPending;
+
+	const [value, setValue] = useState("1");
+
+	useEffect(() => {
+		if (current) {
+			setValue(String(current));
+		}
+	}, [current]);
+
+	// Concurrent builds are a self-hosted feature; not shown in cloud.
+	if (isCloud) return null;
+
+	const max = haveValidLicense
+		? ENTERPRISE_MAX_CONCURRENCY
+		: FREE_MAX_CONCURRENCY;
+	const clamp = (n: number) => Math.min(max, Math.max(1, n));
+
+	const handleSave = async () => {
+		const parsed = clamp(Number.parseInt(value, 10) || 1);
+		setValue(String(parsed));
+		try {
+			if (serverId) {
+				await updateServer.mutateAsync({ serverId, buildsConcurrency: parsed });
+			} else {
+				await updateWebServer.mutateAsync({ buildsConcurrency: parsed });
+			}
+			await refetch();
+			toast.success("Builds concurrency updated");
+		} catch {
+			toast.error("Error updating builds concurrency");
+		}
+	};
+
+	const hasChanges = Number(value) !== (current ?? 1);
+
+	return (
+		<div className="flex flex-col gap-3 rounded-lg border p-3">
+			<div className="flex flex-row items-center justify-between gap-4">
+				<div className="space-y-0.5">
+					<div className="flex items-center gap-2">
+						<p className="text-sm font-medium">
+							{label ?? serverQuery.data?.name ?? "Dokploy Server"}
+						</p>
+						<span className="text-xs text-muted-foreground rounded border px-1.5 py-0.5">
+							{serverId
+								? (serverQuery.data?.ipAddress ?? "remote server")
+								: "local host"}
+						</span>
+					</div>
+				</div>
+				<div className="flex items-center gap-2">
+					<Input
+						type="number"
+						min={1}
+						max={max}
+						value={value}
+						onChange={(e) => setValue(e.target.value)}
+						className="w-20"
+					/>
+					<Button
+						type="button"
+						size="sm"
+						onClick={handleSave}
+						isLoading={isPending}
+						disabled={!hasChanges}
+					>
+						Save
+					</Button>
+				</div>
+			</div>
+		</div>
+	);
+};

apps/dokploy/components/layouts/side.tsx

@@ -298,6 +298,14 @@ const MENU: Menu = {
 			icon: Server,
 			isEnabled: ({ permissions }) => !!permissions?.server.read,
 		},
+		{
+			isSingle: true,
+			title: "Deployments",
+			url: "/dashboard/settings/deployments",
+			icon: Boxes,
+			isEnabled: ({ permissions, isCloud }) =>
+				!!(permissions?.server.read && !isCloud),
+		},
 		{
 			isSingle: true,
 			title: "Users",