diff --git a/data-discovery/pom.xml b/data-discovery/pom.xml
index 9132e0d6bb632f25b591ed835b7bdbe74bdc1bdb..a87cf98d651075bb67da6d26e76e9ca8bbcf3ffd 100644
--- a/data-discovery/pom.xml
+++ b/data-discovery/pom.xml
@@ -11,8 +11,8 @@
   <properties>
           <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
           <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-          <maven.compiler.source>7</maven.compiler.source>
-          <maven.compiler.target>7</maven.compiler.target>
+          <maven.compiler.source>8</maven.compiler.source>
+          <maven.compiler.target>8</maven.compiler.target>
   </properties>
 
 
diff --git a/data-discovery/src/main/webapp/WEB-INF/web.xml b/data-discovery/src/main/webapp/WEB-INF/web.xml
index f71dce96cd1f3673ceab58ff80736fdd1141a5ed..6ba11f12b0cb13f15eb4a69cc84ee34f44675021 100644
--- a/data-discovery/src/main/webapp/WEB-INF/web.xml
+++ b/data-discovery/src/main/webapp/WEB-INF/web.xml
@@ -27,7 +27,7 @@
         </servlet>
         <servlet-mapping>
                 <servlet-name>vlkb_search</servlet-name>
-                <url-pattern></url-pattern>
+                <url-pattern>/query</url-pattern>
         </servlet-mapping>
 
 
diff --git a/docker/Dockerfile b/docker/Dockerfile
index ec6cf28080101f8bfdbcb7c5a4eeec0099a97ab7..aef2090bd034c0ca0b704c07e93ce5f016097fd3 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -30,9 +30,6 @@ COPY deps/setenv.sh ${CATALINA_BASE}/bin/
 WORKDIR ${CATALINA_BASE}
 RUN chmod -R a+rwX conf
 
-# set default
-env DISCOVERY_CONTEXT_ROOT=datasets
-
 # configure during start-up
 COPY start-siav2.sh /root
 
diff --git a/docker/example-compose.yaml b/docker/example-compose.yaml
index 17f099829f91cf2c84271bbeb4e10d289de5490d..9d6ca035db35d155d502f8850e0362c304900396 100644
--- a/docker/example-compose.yaml
+++ b/docker/example-compose.yaml
@@ -21,11 +21,11 @@ services:
     ports:
       - 8080:8080
     environment:
-      - DISCOVERY_CONTEXT_ROOT=vlkb#datasets#siav2
+      - DISCOVERY_CONTEXT_ROOT=siav2
       - DB_URI=jdbc:postgresql://vlkb-db:5432/vialactea
       - DB_USERNAME=vialactea
       - DB_PASSWORD=ia2vlkb
-      - CUTOUT_SERVICE_URL=http://vlkb-devel.ia2.inaf.it:8004/vlkb/datasets/soda
+      - CUTOUT_SERVICE_URL=http://vlkb-devel.ia2.inaf.it:80/soda
 
 
 volumes:
diff --git a/docker/start-siav2.sh b/docker/start-siav2.sh
index 4bab12eb36e488809add567c062ca071cb82546d..200a1478a7377ab90eaecda1c16bc3d4feb9494d 100755
--- a/docker/start-siav2.sh
+++ b/docker/start-siav2.sh
@@ -6,6 +6,11 @@ set -eux
 date
 env
 
+# set optional
+DISCOVERY_CONTEXT_ROOT=${DISCOVERY_CONTEXT_ROOT:-siav2}
+DBG_LEVEL=${DEBUG_LEVEL:-CONFIG}
+
+
 # configure CONTEXT_ROOT
 
 mkdir -p $CATALINA_BASE/conf/Catalina/localhost
@@ -28,7 +33,6 @@ echo "<Context docBase=\"$WEBAPP_DIR\"/>" > $CATALINA_BASE/conf/Catalina/localho
 
 # configure debug level
 
-DBG_LEVEL=${DEBUG_LEVEL:-CONFIG}
 sed -i "s/.*SearchServlet\.level.*=.*/SearchServlet.level = $DBG_LEVEL/g" $CATALINA_BASE/conf/siav2.logging.properties
 sed -i "s/.*FormatResponseFilter\.level.*=.*/FormatResponseFilter.level = $DBG_LEVEL/g" $CATALINA_BASE/conf/siav2.logging.properties
 sed -i "s/.*DbObstap\.level.*=.*/DbObstap.level = $DBG_LEVEL/g" $CATALINA_BASE/conf/siav2.logging.properties