OAUTH2 basic - a nightmare :-(

The easiest way to do it is from inside the container; you can intercept and print requests between nginx and Discourse by entering the container and running:

apt-get update && apt-get -y install scapy
scapy

# at the scapy prompt, paste in:
class Callback:
  def __init__(self):
    self.last = None
  def prn(self, p):
    if p != self.last: # pcaps on lo capture twice
      self.last = p
      p.hide_defaults()
      print(repr(p)) # this line prints the packet, keep it or leave it
      if scapy.packet.Raw in p.layers():
        try:
          print(p.load.decode())
        except:
          print(p.load)

sniff(filter="port 3000", iface="lo", prn=Callback().prn)
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