feat: init h2c (http2/grpc) support

apps/ui/src/routes/applications/[id]/index.svelte

@@ -79,6 +79,7 @@
 	let isBot = application.settings?.isBot;
 	let isDBBranching = application.settings?.isDBBranching;
 	let htmlUrl = application.gitSource?.htmlUrl;
+	let isHttp2 = application.settings.isHttp2;
 
 	let dockerComposeFile = JSON.parse(application.dockerComposeFile) || null;
 	let dockerComposeServices: any[] = [];
@@ -195,6 +196,9 @@
 		if (name === 'isDBBranching') {
 			isDBBranching = !isDBBranching;
 		}
+		if (name === 'isHttp2') {
+			isHttp2 = !isHttp2;
+		}
 		try {
 			await post(`/applications/${id}/settings`, {
 				previews,
@@ -204,6 +208,7 @@
 				autodeploy,
 				isDBBranching,
 				isCustomSSL,
+				isHttp2,
 				branch: application.branch,
 				projectId: application.projectId
 			});
@@ -746,6 +751,16 @@
 							on:click={() => !isDisabled && changeSettings('dualCerts')}
 						/>
 					</div>
+					<div class="grid grid-cols-2 items-center pb-4">
+						<Setting
+							id="isHttp2"
+							isCenter={false}
+							bind:setting={isHttp2}
+							title="Enable HTTP/2 (h2c only)"
+							description="Enable HTTP/2 protocol. <br><br>HTTP/2 is a major revision of the HTTP network protocol used by the World Wide Web that allows faster web page loading by reducing the number of requests needed to load a web page.<br><br>Useful for gRPC and other HTTP/2 based services."
+							on:click={() => changeSettings('isHttp2')}
+						/>
+					</div>
 					{#if isHttps && application.buildPack !== 'compose'}
 						<div class="grid grid-cols-2 items-center pb-4">
 							<Setting