replaced two icons with SVGs

public/img/metager-schloss.svg

+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="45" height="20" version="1.1" viewBox="0 0 99.167999 106.51305" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"><metadata><rdf:RDF><cc:Work rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type rdf:resource="http://purl.org/dc/dcmitype/StillImage"/><dc:title/></cc:Work></rdf:RDF></metadata><g transform="matrix(1.3333 0 0 -1.3333 -373.81 107.43)"><g transform="scale(.1)"><path d="m2828 805.72v-230.32h69.31c27.25 0 40.87 14.426 40.87 42.879v78.789h345.86c101.01 0 151.51-53.668 151.51-157.63v-85.7h-497.37l0.01-52.015c0-28.313-13.75-42.871-40.87-42.871h-93.81v-140.79c0-140.79 70.4-211.19 212.72-211.19h281.59c165.27 0 249.45 85.699 249.45 255.57v287.7c0 169.87-84.18 255.57-249.45 255.57zm289.79-446.87h74.76c50.36 0 69.52-25.856 69.52-74.098v-112.79c0-38.305-19.21-58.168-56.76-58.168h-38.57c-32.53 0-48.95 19.25-48.95 57.465v187.59" fill="#00000"/></g></g></svg>

public/img/rainbow.svg

+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="45"
+   height="20"
+   viewBox="0 0 100 50"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.4 (5da689c313, 2019-01-14)"
+   sodipodi:docname="rainbows.svg">
+  <defs
+     id="defs2" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Ebene 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <circle
+       style="fill:#ce2026;fill-opacity:1;stroke:none"
+       id="path850"
+       cx="50"
+       cy="50"
+       r="40" />
+    <circle
+       style="fill:#ffffff;fill-opacity:1;stroke:none"
+       id="path851"
+       cx="50"
+       cy="50"
+       r="32" />
+    <circle
+       style="fill:#ffd600;fill-opacity:1;stroke:none"
+       id="path852"
+       cx="50"
+       cy="50"
+       r="30" />
+    <circle
+       style="fill:#ffffff;fill-opacity:1;stroke:none"
+       id="path853"
+       cx="50"
+       cy="50"
+       r="22" />
+    <circle
+       style="fill:#00a888;fill-opacity:1;stroke:none"
+       id="path853"
+       cx="50"
+       cy="50"
+       r="20" />
+    <circle
+       style="fill:#ffffff;fill-opacity:1;stroke:none"
+       id="path854"
+       cx="50"
+       cy="50"
+       r="12" />
+  </g>
+</svg>

resources/views/index.blade.php

@@ -13,7 +13,7 @@
 		<div id="about-us">
 			<div class="m-row">
 				<a href="{{ LaravelLocalization::getLocalizedURL(LaravelLocalization::getCurrentLocale(), "about") }}">
-					<i class="fas fa-lock"></i>
+					<img alt="lock" src="/img/metager-schloss.svg">
 					<span>@lang('index.about.1.1')</span>
 					<div class="teaser">@lang('index.about.1.2')</div>
 				</a>
@@ -22,7 +22,7 @@
 				@else
 				<a href="https://suma-ev.de/en/index.html" target="_blank">
 				@endif
-					<i class="fas fa-heart" id="gradient"></i>
+					<img alt="rainbow" src="/img/rainbow.svg">
 					<span>@lang('index.about.2.1')</span>
 					<div class="teaser">@lang('index.about.2.2')</div>
 				</a>
@@ -34,7 +34,7 @@
 					<div class="teaser">@lang('index.about.3.2')</div>
 				</a>
 				<a href="{{ LaravelLocalization::getLocalizedURL(LaravelLocalization::getCurrentLocale(), "beitritt") }}">
-					<i class="fas fa-hands-helping"></i>
+					<i class="fas fa-heart" id="gradient"></i>
 					<span>@lang('index.about.4.1')</span>
 					<div class="teaser">@lang('index.about.4.2')</div>
 				</a>