Refine info on downloading articles

README.md

@@ -10,7 +10,7 @@ In the root of the project, do the following.
 # Install node modules
 npm i
 
-# Initialize database
+# Initialize database from scratch
 sqlite3 main.db < sql/ds.sql
 sqlite3 main.db < sql/ds.001.sql
 sqlite3 main.db < sql/ds.002.sql
@@ -19,9 +19,28 @@ sqlite3 main.db < sql/ds.002.sql
 wget http://dss.coincidencedetector.com/archive/dss-latest.db.gz
 gzcat dss-latest.db.gz > main.db
 
-# Scrape articles; This may take a few days if done from scratch.
-bin/download-all
-
 # Run the server
 micro-dev -p 1984 site.js
 ```
+
+## Downloading Articles
+
+```sh
+# Download all articles from scratch:
+# This takes a few days and may need babysitting in case of crashes.
+bin/download-all
+
+# Dowloading the last 140 articles per category:
+# If you have a recent snapshot, running this once is how you should get it up to date.
+P=1 bin/download-all
+```
+
+## Cron
+
+To update the database with new articles, replace the value of `DSS_ROOT` with the path
+to where DSS is on your system, and place the following in your crontab.
+
+```sh
+DSS_ROOT=/path/to/dss
+  55  *    *    *    *  cd $DSS_ROOT && bin/articles-update
+```