Switch to sqlite (#22)

* Updated project to use sqlite

* Edited migrations directly because I fear no man

* Updated search functions and tests to work with sqlite

* Updated build tools to remove postgres

.github/workflows/lint_and_test.yml

@@ -24,9 +24,6 @@ jobs:
       - name: Create and populate ENV file
         run: |
           echo MIX_ENV=test >> .env
-          echo POSTGRES_HOST=postgres >> .env
-          echo POSTGRES_USER=postgres >> .env
-          echo POSTGRES_PASSWORD=postgres >> .env
 
       - name: Pull prebuilt images
         run: docker compose pull