This reverts commit 0dde07cc.

some fixes about issues spotted during my manual tests

See merge request e/cloud/my-spot!20

fix tests and enable gitlab CI

See merge request e/cloud/my-spot!19

Engines was stored in set and casted in list, it leads to
issue during merge of result. This patch fixes the engines
container to a list to be able to use json serialization.

Below the error spotted:
```
   File "/usr/local/searx/searx/results.py", line 233, in _merge_result
     duplicated['engines'].add(result['engine'])
 AttributeError: 'list' object has no attribute 'add'
```

This patch removes the deprecation warning, "cgi.escape is deprecated,
use html.escape instead".

Below commands to build and run the docker image:

* docker build -t spotenv -f Dockerfile.env .
* docker run -it --rm  -v $(pwd):/ws -w /ws --network host spotenv bash -c "./manage.sh update_dev_packages; ./manage.sh pep8_check; ./manage.sh unit_tests;"

Broken since the change 7766167d.

Since 96cbb946 the supports of csv,
json and rss are removed.

introduce docker-compose to run spot in a dedicated env

See merge request e/cloud/my-spot!18

In order to run the project in a dedicated environment this
patch introduces the docker-compose file. To join redis service
a setup via an environment variable `SEARX_REDIS_HOST` is added.

Spot project does not work with the new Python client redis 3.X

To avoid to wait 10s when we stop the spot container, this
patch performs some changes to only run the python binary in the container.
Tini is included in docker itself since 1.13 or greater, so it is removed
and the environments variables are handled in the application, that change avoids
to use a bash script to patch the configuration.

sync upstream v0.15.0 to get last changes and fixes

See merge request e/cloud/my-spot!17

Fix spacing between 'more', and language,
Bottom url in results is now a link

Before this, selecting next page in image gallery would put you in general search again,
also fixed mixed video results on first page, that needs to be handled the same as first
page images (currently missing).

Release v0.15.0

[add] mojeek engine

[fix] google videos engine

Remove Ixquick engine

restore startpage search results

Fix bing image thumbnail path