Add missing Github settings file for deployment (#3)

Co-authored-by: jnnfr <jennifer.boedker@qbic.uni-tuebingen.de>

Author: sven1103

.github.settings.xml

@@ -0,0 +1,14 @@
+<settings>
+    <servers>
+        <server>
+            <id>nexus-snapshots</id>
+            <username>${env.MAVEN_REPO_USERNAME}</username>
+            <password>${env.MAVEN_REPO_PASSWORD}</password>
+        </server>
+        <server>
+            <id>nexus-releases</id>
+            <username>${env.MAVEN_REPO_USERNAME}</username>
+            <password>${env.MAVEN_REPO_PASSWORD}</password>
+        </server>
+    </servers>
+</settings>