Add to the Dash0 instrumentation image an LD_PRELOAD injector that:

1. Works irrespective of the libc flavour used by the dynamically-linked host process (e.g., Node v8, CPython, the JVM)
2. Modified on-demand the value of environment variables looked up by the host process through the getenv LibC API (currently implemented: NODE_OPTIONS)

The injector replicates internally a subset of the libc APIs related with string comparison and manipulation. That code is adapted from muse libc, and the respective copyright notice is included.