Connect to spark independent of the host name

airflow.Dockerfile

@@ -11,6 +11,9 @@ RUN wget https://jdbc.postgresql.org/download/postgresql-42.7.4.jar -P  /home/ai
 RUN mv /tmp/upstream/exercises/winter_semester_2024-2025/05_airflow/plugins /home/airflow/airflow
 RUN mv /tmp/upstream/exercises/winter_semester_2024-2025/05_airflow/dags /home/airflow/airflow
 RUN mv /tmp/upstream/exercises/winter_semester_2024-2025/05_airflow/python /home/airflow/airflow
+
+RUN sed -i 's/SPARK_MASTER_IP=hadoop/SPARK_MASTER_IP=$HADOOP_HOST/' /home/airflow/spark/conf/spark-env.sh
+RUN sed -i 's/SPARK_LOCAL_IP="airflow"/SPARK_LOCAL_IP="localhost"/' /home/airflow/spark/conf/spark-env.sh
 # Pyarrow fails to interperet placeholder, subsitute instead
 RUN sed -i "34 i sed -i 's/hadoop:/$HADOOP_HOST:/g' /home/airflow/hadoop/etc/hadoop/core-site.xml" /startup.sh
 RUN sed -i "34 i sed -i 's/hadoop:/$HADOOP_HOST:/g' /home/airflow/hadoop/etc/hadoop/yarn-site.xml" /startup.sh