Update readme

readme.md

@@ -30,7 +30,7 @@ Once created, load this environment with `source .venv/bin/activate` on Linux or
 
 
 ## Running the Program
-Run the program via `python ./main.py` while at the `python` directory.
+Run the program via `python ./main.py` while at the project root.
 
 ### Expected Output
 Main has two possible outputs.
@@ -43,6 +43,9 @@ Second output is has 2 examples of reading in from JSON files, then 1 example of
 For each read in, the problem should be displayed to console in "Tableau" (aka matrix) form.
 After the one is solved, then it should print the solution in all three formats.
 
+### Example JSON Files
+Some example JSON files are located at `<project_root>/resources/json_files`.
+
 
 ## Running Tests
 To run all unittests for this project, open a terminal and run the `run_unit_tests.sh` bash script.