Uploading of the necessary files, after new volumes were added to docker-compose.yml (sogo-mailcow container)

After new volumes were added to docker-compose.yml in the sogo-mailcow container, it is necessary to include the specified files in the path, in order for docker to correctly start after running `docker compose up` command, otherwise error will appear, as necessary files would be missing.
The files uploaded are original SOGo UI elements, obtained from the sogo-mailcow container. Whenever users will need to change the UI elements, they would just need to change these files. Hence simplifying the process.

data/conf/sogo/custom-fulllogo.svg

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" [
+	<!ENTITY st0 "fill:#50BD37;">
+]>
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 width="640px" height="350px" viewBox="78.712 58.488 640 350" style="enable-background:new 78.712 58.488 640 350;"
+	 xml:space="preserve">
+<path style="&st0;" d="M648.541,145.679c-9.947,0-17.009-7.278-17.009-17.048c0-9.777,7.062-17.057,17.009-17.057
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+	c3.37-8.899,5.197-18.715,5.197-29.166C557.539,147.229,525.234,114.301,479.445,114.301z"/>
+</svg>

data/conf/sogo/custom-shortlogo.svg

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" [
+	<!ENTITY st0 "fill:#50BD37;">
+]>
+<svg version="1.1" id="SOGo" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 width="140.263px" height="140.269px" viewBox="499.737 0 140.263 140.269"
+	 style="enable-background:new 499.737 0 140.263 140.269;" xml:space="preserve">
+<path style="&st0;" d="M569.697,87.024c-9.928,0-16.975-7.264-16.975-17.017c0-9.757,7.047-17.022,16.975-17.022
+	c10.006,0,17.054,7.265,17.054,17.022C586.751,79.76,579.703,87.024,569.697,87.024z M569.667,36.335
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+	C639.737,29.889,610.719,0,569.602,0z"/>
+</svg>