build steps use wrong version of stack and are missing some libraries

In the README.md, The following instruction:
```bash
# install haskell stack
curl -sSL https://get.haskellstack.org/ | sh
```
pulls down the latest stack version and installs it.

However, the repository hasn't been contributed to in a while and the latest version of stack no longer supports the stack yml config file.

I got it to work by downloading a stack version from 2018 instead.

I also found i needed to install a fair few new packages that are not listed in the build steps:
```
apt install -y pkg-config libpcre++-dev libpq-dev unixodbc-dev
```
(I am running on Ubuntu 22.04)