diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 72aba02b..9756d203 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,13 +21,18 @@ env:
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v2
 
       - name: REUSE Compliance Check
         uses: fsfe/reuse-action@v1
-        
+
+      - name: Build graph
+        run: |
+          apt install osmium-tool wget
+          ./build-graph
+
       - name: Build docker file
         uses: noi-techpark/github-actions/docker-build@v2
         with:
diff --git a/build-config.json b/build-config.json
index fec2840c..5aeea626 100644
--- a/build-config.json
+++ b/build-config.json
@@ -6,12 +6,14 @@
       "source": "https://gtfs.api.opendatahub.com/v1/dataset/sta-time-tables/raw",
       "type": "gtfs",
       "feedId": "sta"
-    },
-    {
+    }
+    /*
+     this feed is not GTFS-compliant yet: https://github.com/noi-techpark/odh-mentor-otp/issues/168#issuecomment-1904328702
+    ,{
       "source": "https://gtfs.api.opendatahub.com/v1/dataset/skyalps-flight-data/raw",
       "type": "gtfs",
       "feedId": "skyalps"
-    }
+    }*/
   ],
   "osm": [
     {
diff --git a/build-graph.sh b/build-graph.sh
index 99abd8dc..587bfaf5 100755
--- a/build-graph.sh
+++ b/build-graph.sh
@@ -14,8 +14,8 @@ OTP_IMAGE=docker.io/opentripplanner/opentripplanner:2.5.0_2024-01-19T14-50
 wget https://download.geofabrik.de/europe/italy/nord-est-latest.osm.pbf -O ${NORTH_EASTH_PBF} --no-clobber
 osmium extract ${NORTH_EASTH_PBF} --polygon south-tyrol.geojson -o ${SOUTH_TYROL_PBF} --overwrite
 
-podman run \
+docker run \
   -v .:/var/opentripplanner/:z \
   --rm \
-  -e JAVA_TOOL_OPTIONS="Xmx16G" \
+  -e JAVA_TOOL_OPTIONS="-Xmx6G" \
   ${OTP_IMAGE} --build --save
diff --git a/infrastructure/docker/otp/Dockerfile b/infrastructure/docker/otp/Dockerfile
index 362de8da..861b803a 100644
--- a/infrastructure/docker/otp/Dockerfile
+++ b/infrastructure/docker/otp/Dockerfile
@@ -1,54 +1,8 @@
-FROM node:16.14.0-alpine3.14
+FROM docker.io/opentripplanner/opentripplanner:2.5.0_2024-01-19T14-50
 
-ARG OTP_VERSION=1.5.2
-ARG GTFS_URL_UPDATETIME="0 2 * * *"
+WORKDIR /var/otp
 
-ENV JAVA_MX=4G \
-    GBFS_VERSION=1 \
-    GTFS_URL=ftp://ftp.sta.bz.it/gtfs/google_transit_shp.zip \
-    GTFS_URL_UPDATETIME=$GTFS_URL_UPDATETIME \
-    GTFS_URL_UPDATEHOOK=''
+ADD router-config.json /var/otp/
+ADD graph.obj /var/otp/
 
-RUN apk add --no-cache \
-    openjdk8-jre \
-    unzip \
-    bash \
-    curl \
-    gdal-tools
-
-RUN mkdir -p /usr/local/share/java
-RUN mkdir -p /var/otp
-RUN mkdir -p /conf
-
-# OpenTripPlanner Openmove fork https://github.com/openmove/OpenTripPlanner
-
-#RUN curl -o /usr/local/share/java/otp.jar https://repo1.maven.org/maven2/org/opentripplanner/otp/$OTP_VERSION/otp-$OTP_VERSION-shaded.jar
-#COPY otp-1.5.0-clusters-extended.jar /usr/local/share/java/otp-unofficial.jar
-
-#RUN curl -Lo otp-unofficial.jar "https://github.com/openmove/OpenTripPlanner/releases/download/v${OTP_VERSION}/otp-${OTP_VERSION}-SNAPSHOT-shaded.jar"
-#COPY otp-unofficial.jar /usr/local/share/java/otp-unofficial.jar
-
-COPY otp-1.5.2-openmove.jar /usr/local/share/java/otp-unofficial.jar
-
-COPY otp.sh /usr/local/bin/
-COPY otp-unofficial.sh /usr/local/bin/
-
-COPY infrastructure/docker/otp/docker-entrypoint.sh /docker-entrypoint.sh
-
-COPY build-config.json /conf/
-COPY router-config.json /conf/
-COPY envconfig.js /conf/
-
-COPY ./gtfs2bbox /gtfs2bbox
-COPY ./gtfs-import-task /gtfs-import-task
-
-RUN chmod 755 /gtfs-import-task/gtfs-download.sh
-
-RUN cd /gtfs2bbox && \
-	npm install
-
-RUN chmod 755 /usr/local/bin/*
-RUN chmod 755 /docker-entrypoint.sh
-
-ENTRYPOINT ["/bin/bash"]
-CMD ["/docker-entrypoint.sh"]
+ENTRYPOINT java $JAVA_OPTS -cp @/app/jib-classpath-file @/app/jib-main-class-file /var/otp/ --load --serve
\ No newline at end of file