Issues uncovered on the target system

[wirew0rm]

I started deploying the current state of the opendigitizer service to one of our target systems to be able to see if there are any problems which do not occur with localhost testing. This issue is to collect these.

• service
  • service needs to provide https endpoint since shared array buffer is not available without https (except on localhost) Adressed in Make OpenDigitizer Service and UI work with https #165, only missing the dns service url
  • generic majordomo webinterface generates absolute urls instead of relative ones
• UI
  • lots of fixed references to localhost:8080 (dns, dashboards) Fixed in Make OpenDigitizer Service and UI work with https #165
• build system, mostly I got patches/workarounds there
  • SERVING_DIR has to be configurable (patched to set a cmake CACHE variable for now)
  • fftw build needs additional --host=x86_64 parameter because it's technically a cross build
  • externalProject emscripten build picks up environment variables (LDFLAGS) from the x86 build-system