diff --git a/frontend/example-html/script.js b/frontend/example-html/script.js
index aeba01d..9e8a190 100644
--- a/frontend/example-html/script.js
+++ b/frontend/example-html/script.js
@@ -1,85 +1,85 @@
 async function decrypt(ciphertext, password) {
-    const pwUtf8 = new TextEncoder().encode(password);
-    const pwHash = await crypto.subtle.digest('SHA-256', pwUtf8);
-    const ctUtf8 = new Uint8Array(ciphertext);
-    const iv = ctUtf8.slice(0, 12);
-    const alg = { name: 'AES-GCM', iv: iv, additionalData: iv };
-    const key = await crypto.subtle.importKey('raw', pwHash, alg, false, ['decrypt']);
-    try {
-        const buf = await crypto.subtle.decrypt(alg, key, ctUtf8.slice(12));
-        return new TextDecoder().decode(buf);
-    } catch (e) {
-        throw new Error('Decrypt failed')
-    }
+	const pwUtf8 = new TextEncoder().encode(password);
+	const pwHash = await crypto.subtle.digest('SHA-256', pwUtf8);
+	const ctUtf8 = new Uint8Array(ciphertext);
+	const iv = ctUtf8.slice(0, 12);
+	const alg = { name: 'AES-GCM', iv: iv, additionalData: iv };
+	const key = await crypto.subtle.importKey('raw', pwHash, alg, false, ['decrypt']);
+	try {
+		const buf = await crypto.subtle.decrypt(alg, key, ctUtf8.slice(12));
+		return new TextDecoder().decode(buf);
+	} catch (e) {
+		throw new Error('Decrypt failed')
+	}
 }
 
 function setError(text) {
-    document.getElementById('msg').innerText = text;
+	document.getElementById('msg').innerText = text;
 }
 
 function setFields(elem, fields) {
-    for (const [k, v] of Object.entries(fields)) {
-        for (const el of elem.querySelectorAll('#' + k)) {
-            el.innerText = v;
-        }
-    }
+	for (const [k, v] of Object.entries(fields)) {
+		for (const el of elem.querySelectorAll('#' + k)) {
+			el.innerText = v;
+		}
+	}
 }
 
 async function apply(data, password) {
-    const json = JSON.parse(await decrypt(data, password));
-    const now = new Date().getTime();
-    const vA = new Date(json['valid_since'] + 'T00:00:00');
-    if (vA.getTime() > now) {
-        return setError('Member card not valid yet');
-    }
-    const vZ = new Date(json['valid_until'] + 'T23:59:59');
-    if (vZ.getTime() < now) {
-        return setError('Member card expired');
-    }
-    const pass = document.getElementById('pass');
-    const imgElem = pass.querySelector('#img');
-    if (imgElem) {
-        if (json['img']) {
-            imgElem.src = 'data:image;base64,' + json['img'];
-        } else {
-            imgElem.src = 'img/no-img.svg';
-        }
-    }
-    setFields(pass, {
-        name: json['name'],
-        member_id: json['id'],
-        org_name: json['org'],
-        valid: 'on ' + new Date().toLocaleDateString('en'),
-    });
-    setFields(pass, json['data']); // may overwrite previous fields
+	const json = JSON.parse(await decrypt(data, password));
+	const now = new Date().getTime();
+	const vA = new Date(json['valid_since'] + 'T00:00:00');
+	if (vA.getTime() > now) {
+		return setError('Member card not valid yet');
+	}
+	const vZ = new Date(json['valid_until'] + 'T23:59:59');
+	if (vZ.getTime() < now) {
+		return setError('Member card expired');
+	}
+	const pass = document.getElementById('pass');
+	const imgElem = pass.querySelector('#img');
+	if (imgElem) {
+		if (json['img']) {
+			imgElem.src = 'data:image;base64,' + json['img'];
+		} else {
+			imgElem.src = 'img/no-img.svg';
+		}
+	}
+	setFields(pass, {
+		name: json['name'],
+		member_id: json['id'],
+		org_name: json['org'],
+		valid: 'on ' + new Date().toLocaleDateString('en'),
+	});
+	setFields(pass, json['data']); // may overwrite previous fields
 
-    const title = 'Member card for ' + json['name'] + ' – ' + json['org'];
-    document.head.querySelector('title').innerText = title;
-    document.getElementById('msg').classList.add('hidden');
-    pass.classList.remove('hidden');
+	const title = 'Member card for ' + json['name'] + ' – ' + json['org'];
+	document.head.querySelector('title').innerText = title;
+	document.getElementById('msg').classList.add('hidden');
+	pass.classList.remove('hidden');
 }
 
 async function onLoad() {
-    // reset previous download
-    document.getElementById('pass').classList.add('hidden');
-    const msg = document.getElementById('msg');
-    msg.innerText = msg.dataset.load;
-    msg.classList.remove('hidden');
-    // download new data
-    const [org, uuid, secret] = location.hash.slice(1).split('/');
-    if (!org || !uuid || !secret) {
-        return setError('Invalid URL');
-    }
-    const res = await fetch('./data/' + org + '/' + uuid);
-    if (!res.ok) {
-        return setError('Error loading\n\n' + res.status + ' ' + res.statusText);
-    }
-    try {
-        const data = await res.arrayBuffer();
-        await apply(data, secret);
-    } catch (e) {
-        setError(e);
-    }
+	// reset previous download
+	document.getElementById('pass').classList.add('hidden');
+	const msg = document.getElementById('msg');
+	msg.innerText = msg.dataset.load;
+	msg.classList.remove('hidden');
+	// download new data
+	const [org, uuid, secret] = location.hash.slice(1).split('/');
+	if (!org || !uuid || !secret) {
+		return setError('Invalid URL');
+	}
+	const res = await fetch('./data/' + org + '/' + uuid);
+	if (!res.ok) {
+		return setError('Error loading\n\n' + res.status + ' ' + res.statusText);
+	}
+	try {
+		const data = await res.arrayBuffer();
+		await apply(data, secret);
+	} catch (e) {
+		setError(e);
+	}
 }
 
 // load and parse data
@@ -92,10 +92,10 @@ window.addEventListener('hashchange', onLoad, true);
 // -------------
 
 function onResize() {
-    const card = document.getElementById('card');
-    const sw = window.innerWidth / card.offsetWidth;
-    const sh = window.innerHeight / card.offsetHeight;
-    card.style.scale = Math.min(Math.min(sw, sh) * 0.97, 2);
+	const card = document.getElementById('card');
+	const sw = window.innerWidth / card.offsetWidth;
+	const sh = window.innerHeight / card.offsetHeight;
+	card.style.scale = Math.min(Math.min(sw, sh) * 0.97, 2);
 }
 
 window.addEventListener('resize', onResize, true);
@@ -109,16 +109,16 @@ screen?.orientation?.addEventListener('change', onResize, true);
 lastUpdate = new Date().getTime();
 
 function needsUpdate() {
-    // reload page if older than 15min
-    const now = new Date().getTime();
-    if (now - lastUpdate > 900_000) {
-        lastUpdate = now;
-        onLoad();
-    }
+	// reload page if older than 15min
+	const now = new Date().getTime();
+	if (now - lastUpdate > 900_000) {
+		lastUpdate = now;
+		onLoad();
+	}
 }
 // setInterval(needsUpdate, 1000);
 window.addEventListener('focus', needsUpdate, true);
 window.addEventListener('pageshow', needsUpdate, true);
 window.addEventListener('visibilitychange', function () {
-    !document.hidden && document.visibilityState !== 'hidden' && needsUpdate();
+	!document.hidden && document.visibilityState !== 'hidden' && needsUpdate();
 }, true);