diff --git a/dashboard/.env.example b/dashboard/.env.example
index 86c143e..064b7e8 100644
--- a/dashboard/.env.example
+++ b/dashboard/.env.example
@@ -21,14 +21,14 @@ LOG_STACK=single
 LOG_DEPRECATIONS_CHANNEL=null
 LOG_LEVEL=debug
 
-DB_CONNECTION=sqlite
+# DB_CONNECTION=sqlite
 # DB_HOST=127.0.0.1
 # DB_PORT=3306
 # DB_DATABASE=laravel
 # DB_USERNAME=root
 # DB_PASSWORD=
 
-SESSION_DRIVER=database
+SESSION_DRIVER=file
 SESSION_LIFETIME=120
 SESSION_ENCRYPT=false
 SESSION_PATH=/
diff --git a/dashboard/README.md b/dashboard/README.md
index 48b752c..ae7f96c 100644
--- a/dashboard/README.md
+++ b/dashboard/README.md
@@ -1,8 +1,16 @@
-# How to run 
+# Install
+## Prerequisites
+- In order to run this project please install all required software according to the laravel documentation: https://laravel.com/docs/11.x#installing-php
+
+## Configuration & installation
+- Make a copy of the .env.example to .env
+- Run the following commands:
+```bash
+composer install && php artisan key:generate && npm i
+```
+
+# Run server
 ```bash
 composer run dev
 ```
 
-```bash
-npm run build
-```
diff --git a/dashboard/resources/views/overview.blade.php b/dashboard/resources/views/overview.blade.php
index 2a1196f..8f3f870 100644
--- a/dashboard/resources/views/overview.blade.php
+++ b/dashboard/resources/views/overview.blade.php
@@ -19,8 +19,88 @@
 <article>
     <div id="leaflet"></div>
 </article>
-
+<article class="header">
+    <header>
+      <h2>
+        Gesamtauslastung
+      </h2>
+    </header>
+    <div id="chart-heatmap"></div>
+</article>
 <script type="module">
+const hours = [
+    '12a', '1a', '2a', '3a', '4a', '5a', '6a',
+    '7a', '8a', '9a', '10a', '11a',
+    '12p', '1p', '2p', '3p', '4p', '5p',
+    '6p', '7p', '8p', '9p', '10p', '11p'
+];
+
+const extractionDates = {!! json_encode($growth['dates']) !!};
+
+
+// prettier-ignore
+let data = [];
+
+for(let i = 0; i <= extractionDates.length; i++){
+  for(let j = 0; j <= hours.length; j++){
+    data.push([j,i,Math.random() * 3]);
+  }
+}
+
+const chartHeatmap = document.getElementById('chart-heatmap');
+const cHeatmap = echarts.init(chartHeatmap);
+const cHeatmapOptions = {
+  tooltip: {
+    position: 'top'
+  },
+  grid: {
+    top: 0,
+    right: 0,
+    bottom: 0,
+    left: 0
+  },
+  xAxis: {
+    type: 'category',
+    data: hours,
+    splitArea: {
+      show: false
+    }
+  },
+  yAxis: {
+    type: 'category',
+    data: extractionDates,
+    splitArea: {
+      show: true
+    }
+  },
+  visualMap: {
+    min: 0,
+    max: 10,
+    calculable: true,
+    orient: 'horizontal',
+    left: 'center',
+    bottom: '15%'
+  },
+  series: [
+    {
+      name: 'Punch Card',
+      type: 'heatmap',
+      data: data,
+      label: {
+        show: false
+      },
+      emphasis: {
+        itemStyle: {
+          shadowBlur: 10,
+          shadowColor: 'rgba(0, 0, 0, 0.5)'
+        }
+      }
+    }
+  ]
+}
+
+cHeatmap.setOption(cHeatmapOptions);
+
 const chartPropsPerRegion = document.getElementById('chart-props-per-region');
 const cPropsPerRegion = echarts.init(chartPropsPerRegion);
 const cPropsPerRegionOptions = {
@@ -71,7 +151,7 @@ const cExtractionsOptions = {
   xAxis: {
     type: 'category',
     boundaryGap: false,
-    data: {!! json_encode($growth['dates']) !!}
+    data: extractionDates
   },
   yAxis: {
     type: 'value'
@@ -121,7 +201,6 @@ L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
 
 const properties = {!! json_encode($geo) !!}
 properties.forEach( prop => {
-    console.log(prop);
     let coords = prop.coordinates.split(',');
     L.marker(coords).addTo(map).bindPopup('<a href="/prop/'+prop.id+'">'+prop.coordinates+'</a>');
 })
diff --git a/documentation/diagrams/Systemarchitektur_C4.drawio b/documentation/diagrams/Systemarchitektur_C4.drawio
new file mode 100644
index 0000000..1a22463
--- /dev/null
+++ b/documentation/diagrams/Systemarchitektur_C4.drawio
@@ -0,0 +1,31 @@
+<mxfile host="app.diagrams.net" agent="Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0" version="25.0.3">
+  <diagram name="Seite-1" id="5abS_fUiar5VuBZXZINZ">
+    <mxGraphModel dx="1195" dy="1534" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="827" pageHeight="1169" math="0" shadow="0">
+      <root>
+        <mxCell id="0" />
+        <mxCell id="1" parent="0" />
+        <object placeholders="1" c4Name="REST-API" c4Type="Python (FastAPI)" c4Description="REST Schnittstelle" label="&lt;font style=&quot;font-size: 16px&quot;&gt;&lt;b&gt;%c4Name%&lt;/b&gt;&lt;/font&gt;&lt;div&gt;[%c4Type%]&lt;/div&gt;&lt;br&gt;&lt;div&gt;&lt;font style=&quot;font-size: 11px&quot;&gt;&lt;font color=&quot;#cccccc&quot;&gt;%c4Description%&lt;/font&gt;&lt;/div&gt;" id="DRD_0cKAZXVdgcTgqyKr-1">
+          <mxCell style="rounded=1;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#1061B0;fontColor=#ffffff;align=center;arcSize=10;strokeColor=#0D5091;metaEdit=1;resizable=0;points=[[0.25,0,0],[0.5,0,0],[0.75,0,0],[1,0.25,0],[1,0.5,0],[1,0.75,0],[0.75,1,0],[0.5,1,0],[0.25,1,0],[0,0.75,0],[0,0.5,0],[0,0.25,0]];" vertex="1" parent="1">
+            <mxGeometry x="360" y="40" width="240" height="120" as="geometry" />
+          </mxCell>
+        </object>
+        <mxCell id="DRD_0cKAZXVdgcTgqyKr-5" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" edge="1" parent="1" source="DRD_0cKAZXVdgcTgqyKr-2" target="DRD_0cKAZXVdgcTgqyKr-1">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+        <object placeholders="1" c4Name="Data" c4Type="Python (Polars)" c4Description="Eigenes Python Package. Enthält Programmcode für das ETL" label="&lt;font style=&quot;font-size: 16px&quot;&gt;&lt;b&gt;%c4Name%&lt;/b&gt;&lt;/font&gt;&lt;div&gt;[%c4Type%]&lt;/div&gt;&lt;br&gt;&lt;div&gt;&lt;font style=&quot;font-size: 11px&quot;&gt;&lt;font color=&quot;#cccccc&quot;&gt;%c4Description%&lt;/font&gt;&lt;/div&gt;" id="DRD_0cKAZXVdgcTgqyKr-2">
+          <mxCell style="rounded=1;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#1061B0;fontColor=#ffffff;align=center;arcSize=10;strokeColor=#0D5091;metaEdit=1;resizable=0;points=[[0.25,0,0],[0.5,0,0],[0.75,0,0],[1,0.25,0],[1,0.5,0],[1,0.75,0],[0.75,1,0],[0.5,1,0],[0.25,1,0],[0,0.75,0],[0,0.5,0],[0,0.25,0]];" vertex="1" parent="1">
+            <mxGeometry x="40" y="40" width="240" height="120" as="geometry" />
+          </mxCell>
+        </object>
+        <object placeholders="1" c4Name="Datenbank" c4Type="Container" c4Technology="DuckDB" c4Description="Datenbank, welches die aggregierten Daten enthält." label="&lt;font style=&quot;font-size: 16px&quot;&gt;&lt;b&gt;%c4Name%&lt;/b&gt;&lt;/font&gt;&lt;div&gt;[%c4Type%:&amp;nbsp;%c4Technology%]&lt;/div&gt;&lt;br&gt;&lt;div&gt;&lt;font style=&quot;font-size: 11px&quot;&gt;&lt;font color=&quot;#E6E6E6&quot;&gt;%c4Description%&lt;/font&gt;&lt;/div&gt;" id="DRD_0cKAZXVdgcTgqyKr-3">
+          <mxCell style="shape=cylinder3;size=15;whiteSpace=wrap;html=1;boundedLbl=1;rounded=0;labelBackgroundColor=none;fillColor=#23A2D9;fontSize=12;fontColor=#ffffff;align=center;strokeColor=#0E7DAD;metaEdit=1;points=[[0.5,0,0],[1,0.25,0],[1,0.5,0],[1,0.75,0],[0.5,1,0],[0,0.75,0],[0,0.5,0],[0,0.25,0]];resizable=0;" vertex="1" parent="1">
+            <mxGeometry x="40" y="240" width="240" height="120" as="geometry" />
+          </mxCell>
+        </object>
+        <mxCell id="DRD_0cKAZXVdgcTgqyKr-4" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;exitPerimeter=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;entryPerimeter=0;" edge="1" parent="1" source="DRD_0cKAZXVdgcTgqyKr-2" target="DRD_0cKAZXVdgcTgqyKr-3">
+          <mxGeometry relative="1" as="geometry" />
+        </mxCell>
+      </root>
+    </mxGraphModel>
+  </diagram>
+</mxfile>