feat(database): add support for sqlite database

An sqlite database is much easier to setup for simple local deployments
and specifically for test automation.

src/base/config.py

@@ -108,15 +108,19 @@ class AuraConfig:
         Retrieves the database connection string.
         """
         db_name = str(self.get("db_name"))
-        db_user = str(self.get("db_user"))
-        db_pass = str(self.get("db_pass"))
-        db_host = str(self.get("db_host"))
         db_type = str(self.get("db_type"))
-        db_charset = self.get("db_charset", "utf8")
-        if db_type == "mysql":
-            return "mysql://" + db_user + ":" + db_pass + "@" + db_host + "/" + db_name + "?charset=" + db_charset
-        elif db_type == "postgresql":
-            return f"postgresql+psycopg2://{db_user}:{db_pass}@{db_host}/{db_name}?client_encoding={db_charset}"
+        if db_type in {"mysql", "postgresql"}:
+            db_user = str(self.get("db_user"))
+            db_pass = str(self.get("db_pass"))
+            db_host = str(self.get("db_host"))
+            db_charset = self.get("db_charset", "utf8")
+            if db_type == "mysql":
+                return f"mysql://{db_user}:{db_pass}@{db_host}/{db_name}?charset={db_charset}"
+            else:
+                return f"postgresql+psycopg2://{db_user}:{db_pass}@{db_host}/{db_name}?client_encoding={db_charset}"
+        elif db_type == "sqlite":
+            # "db_name" is expected to be either a relative or an absolute path to the sqlite file
+            return f"sqlite:///{db_name}"
         else:
             return f"Error: invalid database type '{db_type}'"