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

config/test.exs

@@ -14,12 +14,9 @@ config :pinchflat, Oban, testing: :manual
 # to provide built-in test partitioning in CI environment.
 # Run `mix help test` for more information.
 config :pinchflat, Pinchflat.Repo,
-  username: System.get_env("POSTGRES_USER"),
-  password: System.get_env("POSTGRES_PASSWORD"),
-  hostname: System.get_env("POSTGRES_HOST"),
-  database: "pinchflat_test#{System.get_env("MIX_TEST_PARTITION")}",
-  pool: Ecto.Adapters.SQL.Sandbox,
-  pool_size: 10
+  database: Path.expand("../priv/repo/pinchflat_test.db", Path.dirname(__ENV__.file)),
+  pool_size: 5,
+  pool: Ecto.Adapters.SQL.Sandbox
 
 # We don't run a server during test. If one is required,
 # you can enable the server option below.