Docker image build fails

When you try to make a `docker build -t image .` the build fails with the following error

```
Sending build context to Docker daemon 96.77kB
Step 1/10 : FROM python:3.7
---> 32260605cf7a
Step 2/10 : WORKDIR /app
---> Using cache
---> e894f2a1fd61
Step 3/10 : COPY requirements*.txt /app/
---> Using cache
---> 3088a2749954
Step 4/10 : RUN pip install -r requirements.txt
---> Using cache
---> 725a9378c843
Step 5/10 : ADD . /app
---> d7286ced25ad
Step 6/10 : RUN bunzip2 /app/demo/db.sql.bz2
---> Running in c48fc7e6a4b3
bunzip2: Can't open input file /app/demo/db.sql.bz2: No such file or directory.
The command '/bin/sh -c bunzip2 /app/demo/db.sql.bz2' returned a non-zero code: 1
```