Update to Node 18.20 for Memory Leak Fix (#225)

Updating to Node 18.20 will fix a memory leak regression that has been affecting Jest for a while, see here for references:

https://github.com/jestjs/jest/issues/11956

https://github.com/nodejs/node/pull/51004

Dockerfile

@@ -10,7 +10,7 @@ ARG SDK_VERSION=commandlinetools-linux-9477386_latest.zip
 ARG ANDROID_BUILD_VERSION=34
 ARG ANDROID_TOOLS_VERSION=34.0.0
 ARG NDK_VERSION=26.1.10909125
-ARG NODE_VERSION=18
+ARG NODE_VERSION=18.20
 ARG WATCHMAN_VERSION=4.9.0
 ARG CMAKE_VERSION=3.22.1