Add README

README.md

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+# BiocHowTo
+
+This repository contains short, stand-alone "How To" documents related to 
+Bioconductor. 
+
+## How to contribute
+
+To contribute, first fork this repository and create a new branch. Then 
+copy and rename the `howto_template.qmd` file (inside the `vignettes` 
+directory), and edit the copy accordingly. Next, add any new package that you 
+are using to the dependencies of the package, e.g. using 
+
+```
+usethis::use_package("new_dependency")
+```
+
+Then, push the changes to your forked repository and open a pull request to 
+the `devel` branch of the parent repository.