Remove deb installation dependencies on mongo and elasticsearch as they could...

Remove deb installation dependencies on mongo and elasticsearch as they could be installed on another machine

README.md

 ## Installation
 
+### Prerequisites
+
+The Generic Search is a Java application currently has the following requirements:
+* Java 11 (JDK for compiling grammars in the [GTF](https://gitlab.rz.uni-bamberg.de/gtf/gtf-framework/gtf))
+* Elasticsearch 7
+* MongoDB
+
 ### APT package installation
 
 #### 1. Add the repository key

search-ui/build.gradle

@@ -95,10 +95,7 @@ task alternativeDeb(type: Deb) {
 
 tasks.withType(Deb) {
     dependsOn(build)
-    
     requires('default-jdk').or('default-jdk-headless')
-    requires('mongodb').or('mongodb-org')
-    requires('elasticsearch')
     
     os = LINUX
     arch = 'all'
@@ -152,4 +149,4 @@ task publishDebPackages {
     }
 }
 
-publish.finalizedBy publishDebPackages
\ No newline at end of file
+publish.finalizedBy publishDebPackages