message: add ca-certificates to linux prerequisites
  this is needed to download things via https
diff: @@ -99,7 +99,7 @@ Linux
  To build Iroha, you will need the following packages:
  -``build-essential`` ``git`` ``tar`` ``ninja-build`` ``curl`` ``unzip`` ``cmake``
  +``build-essential`` ``git`` ``ca-certificates`` ``tar`` ``ninja-build`` ``curl`` ``unzip`` ``cmake``
  Use this code to install environment dependencies on Debian-based Linux distro.
  @@ -108,7 +108,7 @@ Use this code to install environment dependencies on Debian-based Linux distro.
  apt-get update; \
  apt-get -y --no-install-recommends install \
  build-essential ninja-build \
  - git tar curl unzip cmake
  + git ca-certificates tar curl unzip cmake
  .. note:: If you are willing to actively develop Iroha and to build shared
  libraries, please consider installing the
  