Move get_repos.sh to backend folder and update references

backend/get_repos.sh

@@ -9,7 +9,7 @@ cd ./scripts
 go clean
 go run build_tables.go
 
-if [ $(ls ../tables/*.txt | wc -l) -lt 10 ]; then
+if [ $(ls ./tables/*.txt | wc -l) -lt 10 ]; then
   echo "Error: less than 10 .txt files in tables folder"
   exit 1
 fi