diff --git a/docs/Writerside/s.tree b/docs/Writerside/s.tree
index 970452d2..17c12ef5 100644
--- a/docs/Writerside/s.tree
+++ b/docs/Writerside/s.tree
@@ -7,13 +7,16 @@
                  start-page="Overview.md">
 
     <toc-element topic="Overview.md"/>
+    <toc-element topic="Development.md"/>
     <toc-element topic="Github.md">
         <toc-element topic="Actions.md"/>
     </toc-element>
     <toc-element topic="Server.md">
         <toc-element topic="New-Deployment.md"/>
     </toc-element>
-    <toc-element topic="Database.md"/>
+    <toc-element topic="Database.md">
+        <toc-element topic="Liquibase.md"/>
+    </toc-element>
     <toc-element topic="Services.md">
         <toc-element topic="Website-Service.md"/>
         <toc-element topic="Usermanagement-Service.md"/>
diff --git a/docs/Writerside/topics/Actions.md b/docs/Writerside/topics/Actions.md
index 8ab82c04..4d95ac2b 100644
--- a/docs/Writerside/topics/Actions.md
+++ b/docs/Writerside/topics/Actions.md
@@ -16,4 +16,7 @@ Responsible to label pull requests with what has changed.
 Google OSV scanner is responsible to find dependencies that are vulnerable.
 
 ## sonarqube.yml (SonarQube Analysis)
-Responsible to do a static code analysis.
\ No newline at end of file
+Responsible to do a static code analysis.
+
+## publish-documentation.yml
+TODO https://www.jetbrains.com/help/writerside/deploy-docs-to-github-pages.html
\ No newline at end of file
diff --git a/docs/Writerside/topics/Database.md b/docs/Writerside/topics/Database.md
index 2f42ce7b..fa3a9bd3 100644
--- a/docs/Writerside/topics/Database.md
+++ b/docs/Writerside/topics/Database.md
@@ -1,5 +1,8 @@
 # Database
 
 
+## Updates
+To update database's table, columns or anything [liquibase](Liquibase.md) is used.
+
 
 ## Backup
\ No newline at end of file
diff --git a/docs/Writerside/topics/Development.md b/docs/Writerside/topics/Development.md
new file mode 100644
index 00000000..9a0970e7
--- /dev/null
+++ b/docs/Writerside/topics/Development.md
@@ -0,0 +1,32 @@
+# Development
+
+Requirements:
+- Java 23 installed
+- Npm installed (lts is best)
+- [Update hosts file]()
+
+
+
+## Update hosts file
+*Remember to take Backup before editing your `hosts` file, mistakes there can block your internet access or cause other network-related issues.*
+
+
+### Windows
+You need Administrator access to update hosts.  
+In ``C:\Windows\System32\drivers\etc`` find file *hosts* and add those lines:
+
+```
+# Microservices
+127.0.0.1 chess.michibaum.ch
+127.0.0.1 gateway.michibaum.ch
+127.0.0.1 registry.michibaum.ch
+127.0.0.1 admin.michibaum.ch
+127.0.0.1 usermanagement.michibaum.ch
+127.0.0.1 authentication.michibaum.ch
+127.0.0.1 fitness.michibaum.ch
+127.0.0.1 music.michibaum.ch
+127.0.0.1 michibaum.ch
+```
+
+### Linux
+In Linux the file is located under ``/etc/hosts``.
diff --git a/docs/Writerside/topics/Liquibase.md b/docs/Writerside/topics/Liquibase.md
new file mode 100644
index 00000000..d0192a34
--- /dev/null
+++ b/docs/Writerside/topics/Liquibase.md
@@ -0,0 +1,3 @@
+# Liquibase
+
+Every Service that uses a Database has [liquibase](https://www.liquibase.com/).
\ No newline at end of file
diff --git a/docs/Writerside/topics/New-Deployment.md b/docs/Writerside/topics/New-Deployment.md
index 916c1398..29fd6e6a 100644
--- a/docs/Writerside/topics/New-Deployment.md
+++ b/docs/Writerside/topics/New-Deployment.md
@@ -1,3 +1,3 @@
 # New Deployment
 
-Every new Deployment is first startet with a pull request and merge into the master branch. This triggers multiple Github actions. One ot these is Build and Publish.
\ No newline at end of file
+Every new Deployment is first startet with a pull request and merge into the master branch. This triggers multiple Github actions. One ot these is [Build and Publish](Actions.md#deploy-yml-build-and-publish).
\ No newline at end of file
diff --git a/docs/Writerside/topics/Website-Service.md b/docs/Writerside/topics/Website-Service.md
index 5d0d8be0..ae4e96ae 100644
--- a/docs/Writerside/topics/Website-Service.md
+++ b/docs/Writerside/topics/Website-Service.md
@@ -1,3 +1,2 @@
 # Website Service
 
-Start typing here...
\ No newline at end of file