Add blog post for the 2.14.2 release of pidgin

Include full changelog for the release and a link to download it on sourceforge

Testing Done:
1. Build image with `docker build -t pidgin-nest -f Dockerfile .`
2. Run image with `docker run -p 3000:3000 -it --rm pidgin-nest:latest`
3. Verified site being served from container was rendering post correctly using a web browser

Reviewed at https://reviews.imfreedom.org/r/592/