* feat: builds with gox and buildx
This change builds all of Authelia respective binaries in parallel within a single step and distributes as necessary to subsequent steps, we now also build and distribute for the following OS/Architecture: freebsd/amd64.
Our CI/CD pipeline now also utilises docker buildx as a default for builds and pushes.
* refactor: clean up docker helper
* Remove `authelia-scripts docker push-image` command as all pushes will be performed with buildx and manifests
* Rename the --arch flag to --container
* Add Dockerfile.dev for users that want to build an Authelia container from source without utilising suites
* Set Dockerfile.dev as default for `authelia-scripts docker build` command
* refactor: variant -> container
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.
