Added some api functions, an express server for the API and nunjucks

Added nunjucks templates for frontend pages.

src/api.ts

@@ -0,0 +1,39 @@
+import * as db from "./database"
+
+var config: any;
+function init(conf: object){
+	config = conf;
+}
+
+async function register(name: string, password: string, streamer: boolean) {
+	if(!config.registration){
+		return {"error":"registration disabled"};
+	}
+	else {
+		if(name.includes(';') || name.includes(' ')) return {"error":"illegal characters"};
+		let s: boolean;
+		if(streamer && config.streamKeys) s = true;
+		else s = false;
+		let r: boolean = await db.addUser(name, password, s, false);
+		if(r) return {"success":""};
+		else return {"error":""};
+	}
+}
+
+async function login(name: string, pass: string) {
+	return await db.validatePassword(name, pass);
+}
+
+async function users(num: number) {
+	return await db.query('select username from users limit '+num);
+}
+
+async function user(name: string) {
+
+}
+
+async function instance() {
+
+}
+
+export { init, register };