Copy task.py and version.py to /usr/local/bin

[stark525]

In order to nicely run as a batch job in cirrus, the Dockerfile needs to copy both task.py and version.py to /usr/local/bin so it is easily accessible.

COPY [ "task.py", "version.py", "/usr/local/bin" ]

[stark525]

Here are steps to reproduce:

1. build the current Dockerfile with docker build . -t tasktemplate1
2. run in interactive mode: docker run -it tasktemplate1 bash1
3. set AWS_DEFAULT_REGION (required here, is set with batch normally) - AWS_DEFAULT_REGION=us-east-1
4. try to execute task.py
   You'll see this:

bash-4.2# export AWS_DEFAULT_REGION=us-east-2
bash-4.2# task.py -h
Traceback (most recent call last):
  File "/usr/local/bin/task.py", line 16, in <module>
    from version import __version__
ModuleNotFoundError: No module named 'version'

With this change you will not have this issue:

bash-4.2# export AWS_DEFAULT_REGION=us-east-1
bash-4.2# task.py -h
usage: task.py [-h] {local,cirrus} ...

cirrus task

positional arguments:
  {local,cirrus}
    local         Locally process (development)
    cirrus        Process Cirrus STAC Process Catalog

optional arguments:
  -h, --help      show this help message and exit
bash-4.2#