Introduce own Numeric type and revert to stdlib from pgx

http/http.go

@@ -12,7 +12,6 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
-	"github.com/jackc/pgtype"
 )
 
 // Handler handles incoming requests
@@ -160,7 +159,7 @@ func (h *Handler) newTransaction(c *gin.Context) {
 	new := postgres.CreateTransactionParams{
 		Memo:      transactionMemo,
 		Date:      transactionDateValue,
-		Amount:    pgtype.Numeric{},
+		Amount:    postgres.Numeric{},
 		AccountID: transactionAccountID,
 	}
 	_, err = h.Service.DB.CreateTransaction(c.Request.Context(), new)