Remove jail doc (will come back after it works)

tests/README.md

@@ -1,24 +0,0 @@
-# tests
-
-## Docker image
-
-The tests must be in a Docker image that will be executed with (among others) the following options :
-
-- `--read-only` Mount the container's root filesystem as read only
-- `--user 1000:1000` Avoid to give root rights
-- `--tmpfs /jail:size=200M,noatime,exec,nodev,nosuid,uid=1000,gid=1000,nr_inodes=5k,mode=1700` Mount a 200MB tmpfs directory to create files and run tests
-- `--memory 500M` Memory limit of 500 MB
-- `--cpus 2.0` Number of CPUs (2 threads)
-- `--mount readonly,type=volume,source=student/username,destination=/app/student` The student's code is available in /app/student
-- `--env HOME=/jail` Set the only writable folder as home directory
-- `--env TMPDIR=/jail` Set the only writable folder as temporary directory
-- `--env USERNAME=` Username
-- `--env EXERCISE=` Exercise name
-- `--env DOMAIN=` Domain name (e.g. gp.ynov-bordeaux.com)
-- `--env EXPECTED_FILES=` A space-separated list of required files
-
-The username is the Gitea login.
-No command or arguments are used, the entrypoint has to run the tests.
-The exit status of the container will determine whether or not the test has passed.
-Any output will be printed in the platform but not interpreted.
-