Add generated skeleton source code files. Skeleton is generated from
solution, to keep items in sync.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Prepend `apt install` command by `apt update` command in `Dockerfile`.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Update configuration files for assignment-async-web-server.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Add skeleton files (`src/`), tests (`tests/`) and `README.md`.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Ignore `readability/todo` rule. This gives an unpleasant warning to use
`TODO(username)` as part of TODO comment items. Just allow simple `TODO`
comment items.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Ignore `build/include_subdir` rule. This gives a rather abnoxious
warning if you simply include "test.h". It should be written as
"./test.h", but that's uncommon.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Add instructions on using the checker: local, remote, Moodle.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

First run `make check`, then `make lint`. This is useful because Moodle
only extract the first 300 lines of output. If `make lint` is first,
that output is typically covered by the linter output, leaving out
students from seeing the checker output (which is more important).

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Copy hidden `.checkpatch.conf` and `.shellcheckrc` in temporary folder
that will be mounted for running Docker interactively.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Replace default DockerHub registry.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

This improves the visibility of linter messages.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

Ignore general output files: object files, libraries, archives,
temporary files.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>

These are setup and checker files for Operating Systems assignments.

Signed-off-by: Razvan Deaconescu <razvan.deaconescu@upb.ro>