update go, add 2021 and 2022 lists

src/scripts/generate.sh

@@ -0,0 +1,20 @@
+# get first argument
+if [ -z "$1" ]; then
+    echo "Please provide a year e.g. 'generate.sh 2023'"
+    exit 1
+fi
+
+
+rm README.md subreddits.txt wordcloud_$1.png;
+
+go run generate-stats.go $1;
+
+wordcloud_cli \
+--text subreddits.txt \
+--imagefile wordcloud_$1.png \
+--color red \
+--background white \
+--height 2000 \
+--width 2000 \
+--margin 10 \
+--mask ./circle.png