Show required/recommended environment for launcher script.

bin/launch_openeo.sh

@@ -1,7 +1,17 @@
 #!/bin/sh
-export JAVA_HOME="..."
-java -Xmx16G \
+
+SRC_DIR={{...}}
+GDAL_HOME={{...}}
+
+export JAVA_HOME={{...}}
+export GDAL_BIN="${GDAL_HOME}/bin/"
+export GDAL_DATA="${GDAL_HOME}/share/gdal/"
+
+export OPENEO_LOGS_DIR=/var/log/openeo
+
+java -Xms4G -Xmx16G \
      -jar \
-     -Djavax.net.ssl.trustStore=/etc/ssl/certs/java/cacerts \
+     -Djavax.net.ssl.trustStore="${JAVA_HOME}/lib/security/cacerts" \
      -Djavax.net.ssl.trustStorePassword=changeit \
-     ./target/openeo-spring-driver-1.0.0-draft.jar
+     -Djava.library.path="${GDAL_HOME}/share/java/" \
+     "${SRC_DIR}/target/openeo-spring-driver-1.1.0-draft.jar"