Update pdf links to static and images to change their path dinamicaly

app/articles/2017/09/16/salgopalyazat-2017-osz.md

app/articles/2018/02/06/2018-tavaszi-ip-igenyles.md

app/articles/2018/02/12/salgopalyazat-2018-tavasz.md

app/articles/2018/08/30/salgopalyazat-2018-osz.md

app/articles/2019/03/30/salgopalyazat-2019-tavasz.md

app/articles/2019/07/04/salgopalyazat-2019-nyar.md

app/articles/2019/09/12/salgopalyazat-2019-osz.md

app/articles/2020/03/05/salgopalyazat-2020-tavasz.md

app/articles/2021/02/26/salgopalyazat-2021-tavasz.md

app/docs/guides/services/01_schaccount.md

app/docs/guides/services/03_remoteapp.md

app/docs/guides/services/06_schnet.md

app/docs/guides/services/07_vpn.md

app/docs/guides/services/img/.gitattributes

app/docs/guides/services/img/adminsch0.jpg

app/docs/guides/services/img/adminsch1.jpg

app/docs/guides/services/img/adminsch2.jpg

app/docs/guides/services/img/adminsch3.jpg

app/docs/guides/services/img/adminsch4.jpg

app/docs/guides/services/img/adminsch5.jpg