Merge pull request #526 from xpavp03/patch-6

more details for Docker newbies

drop fb pixel, not really used and prevent spying

cs fix with Symplfiy 4.1.1

Merge pull request #347 from TomasPilar/trainings-discount

trainings: add discount for student

add anchors

trigger css uncache

[blog] patching post - fix anchor

Merge pull request #313 from pehapkari/move-pehapkari-related-czech-p…

…osts

Move pehapkari related czech posts from TomasVotruba.cz

[blog] Zrádné iterátory v PHP - testy (rebased and cs-fixed replaceme…

…nt) (#300)

* [blog] testy pro článek o iterátorech

* [blog] iterátory: do testů přidán bonus

* tabs -> spaces

* fqn -> ln

* $a -> $object

* same -> equals

* fixed comment

* spaces removal

* [blog] iterators - fix cs

* [blog] iterators - fix cs

* [blog] iterators - use english class naming, enable tests at post

* [blog] iterators - move FixedArray class to /src

* [blog] iterators - split to more specific named tests

* drop unused annotation

Merge pull request #263 from pehapkari/prepare-rewards

writing-contest: title