todo.txt

- read about mappers, entities and services when approaching model
- https://stackoverflow.com/questions/5863870/how-should-a-model-be-structured-in-mvc/5864000#5864000
- https://stackoverflow.com/questions/16356420/mvc-for-advanced-php-developers/16356866#16356866
- practice creating routers
- read about big endian and little endian
      https://www.cs.umd.edu/class/sum2003/cmsc311/Notes/Data/endian.html
- read about 8 byte strings and 64-bit integer, signed and unsigned, blah blah blah
      http://users.ece.utexas.edu/~valvano/embed/chap3/chap3.htm
- (challenge) OK here's a fun task for you lovely people... I have a 32-bit PHP installation. I also have an 8 byte string representing 
   a little-endian signed 64-bit integer. This integer is a unix timestamp with nanosecond granularity (and no, I did not choose this). 
   I want a routine to convert it to a DateTimeImmutable with microseconds. I also want a routine to convert in the opposite direction.  
   https://chat.stackoverflow.com/transcript/11?m=40596165#40596165
   https://3v4l.org/ECHmZ
- figure out how to ssh into dev box using rsa key instead of password