Ensure FTBA uses image's java (#3867)

examples/ftba/stoneblock4/compose.yml

@@ -0,0 +1,17 @@
+services:
+  mc:
+    image: itzg/minecraft-server:java25
+    tty: true
+    stdin_open: true
+    environment:
+      EULA: "TRUE"
+      TYPE: FTBA
+      FTB_MODPACK_ID: "130"
+      FTB_MODPACK_VERSION_ID: "100171"
+      MEMORY: "4G"
+    ports:
+      - "25565:25565"
+    volumes:
+      - data:/data
+volumes:
+  data:

scripts/start-deployFTBA

@@ -93,7 +93,7 @@ if isTrue "$FTB_FORCE_REINSTALL" ||
 
   log "Installing modpack ID ${FTB_MODPACK_ID}, version ID ${FTB_MODPACK_VERSION_ID}"
   log "This could take a while..."
-  ${ftbInstaller} -pack "${FTB_MODPACK_ID}" -version "${FTB_MODPACK_VERSION_ID}" -auto -force | tee ftb-installer.log
+  ${ftbInstaller} -pack "${FTB_MODPACK_ID}" -version "${FTB_MODPACK_VERSION_ID}" -auto -force -no-java | tee ftb-installer.log
   rm -f forge*installer.jar
 
   echo "${FTB_MODPACK_ID}=${FTB_MODPACK_VERSION_ID}" > ${ftbInstallMarker}