build.sh script using Docker

[noisy]

Single command building process:

./build.sh

INFO: entrypoint.sh is added to solve a problem with users permissions. Without it pdf would always have wrong permissions:

22:22 $ ls -la
total 152
drwxrwxr-x  4 kszumny kszumny  4096 Sep  9 22:22 .
drwxrwxr-x 77 kszumny kszumny  4096 Sep  9 19:18 ..
-rw-rw-r--  1 kszumny kszumny 21227 Sep  9 20:10 Bluepaper.md
-rw-r--r--  1 root    root    93112 Sep  9 22:22 Bluepaper.pdf
-rwxrwxr-x  1 kszumny kszumny   164 Sep  9 22:22 build.sh
-rw-rw-r--  1 kszumny kszumny   161 Sep  9 22:22 Dockerfile
-rwxrwxr-x  1 kszumny kszumny   139 Sep  9 22:11 entrypoint.sh
drwxrwxr-x  8 kszumny kszumny  4096 Sep  9 22:22 .git
drwxrwxr-x  2 kszumny kszumny  4096 Sep  9 19:18 images
-rw-rw-r--  1 kszumny kszumny    36 Sep  9 19:47 missfont.log
-rw-rw-r--  1 kszumny kszumny   991 Sep  9 19:18 README.md