add link to database vignette in README

README.Rmd

@@ -60,6 +60,8 @@ epidists
 
 This results a list of database entries. Each entry of the library is an `<epidist>` object.
 
+Alternatively, the library of epiparameters can be viewed as a vignette locally (`vignette("database", package = "epiparameter")`) or on the [{epiparameter} website](https://epiverse-trace.github.io/epiparameter/articles/database.html).
+
 The results can be filtered by disease and epidemiological distribution. Here we set `single_epidist = TRUE` as we only want a single database entry returned, and by default (`single_epidist = FALSE`) it will return all database entries that match the disease (`disease`) and epidemiological distribution (`epi_dist`).
 
 ```{r load-single-epidist}