added dockerisation instructions

README.md

@@ -76,7 +76,31 @@
    git pull gogs@git.fafadiatech.com:harsh/pdf_parser.git
    ```
 
+### Running the docker file:
+1. Launch the terminal.
+2. Change the directory to the docker file by the following command.
+   ```bash
+   cd ~/Code/pdf_parser/docker/
+   ```
+3. Check if docker is installed in your machine using the command below. If it throws an error, refer to this [documentation](https://docs.docker.com/engine/install/)
+   ```bash
+   docker ps
+   ```
+4. Pull the required images using the following command.
+   ```bash
+   docker pull docker-compose.yml
+   ```
+5. Build the docker volume using the following command.
+   ```bash
+   docker-compose build
+   ```
+6. Activate a new screen and activate the containers using the following commands.
+   ```bash
+   screen -S docker
+   docker-compose up
+   ```
+
 ### TODO LIST:
-1. Implementing OCR on tika.
-1. Dockerising the whole apache tika with ocr.
-1. Testing the re on the scanned pdfs.
+- [ ] Implementing OCR on tika.
+- [x] Dockerising apache-tika.
+- [ ] Testing the re on the scanned pdfs