Organize application logic by core/feature breakouts, add dhall configuration support and add a range of new config options in the Reader, add example configuration/deployment files

examples/Dockerfile

@@ -0,0 +1,11 @@
+FROM haskell:9.0.2
+
+WORKDIR /app
+ADD . /app
+
+RUN stack setup
+RUN stack build --copy-bins --local-bin-path ./
+
+EXPOSE 3000
+
+CMD ./Purr-exe