To Run this without docker : 

1. Create and export a environment variable called folder :
   folder=<path to the log directory> ;
   export folder

2. Then run the app.js :
   node app.js

3. To access the webapp, navigate to http://<IP-of-host-machine>:3000/tails



To run the docker version :

1. Pull the image : 
   sudo docker pull kanu15025/log-scroll-final:v5
2. Run the image :
   sudo docker run -it -v <hostfolder>:<mount-folder-on-container> -p 3000:3000 -e folder=<mount-folder-on- container> kanu15025/log-scroll-final:v5



To use features :

1. Specify n : 
   append url with &n=<desired-value-of-n>
2. Specify pattern :
   append url with &grep=<value>