This commit adjusts the build flags to include version information in the LDFLAGS using the -X options. Additionally this makes the information recorded at build time more comprehensive. All build information can now be obtained via the `authelia build` command, and the `authelia version` command is now `authelia --version`. Lastly this adjusts the Dockerfile to utilize docker cache more effectively.
* build: optimize docker builds
This change is so that each of the COPY/RUN steps occurs in a single layer which should theoretically decrease build times.
* build: include license and move scripts
*session secret
*e-mail service password
*smtp server password
*duo-auth api secret key
*ldap bind password
These still need to be specified in the configuration file
but can have dummy values there while the real values are
passed in via environment variables.
James Elliott
Max Planck