tests: remove unnecessary Dockerfile and fix shell script

Signed-off-by: Maximillian Arruda <[email protected]>

Author: dearrudam

jnosql-dynamodb/Dockerfile

@@ -1,8 +1,7 @@
 AWS_ACCESS_KEY_ID=$(aws --profile default configure get aws_access_key_id)
 AWS_SECRET_ACCESS_KEY=$(aws --profile default configure get aws_secret_access_key)
 
-docker build -t my_app .
 docker run -it --rm  -p 8000:8000 \
    -e AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID \
    -e AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY \
-   my_app
+   amazon/dynamodb-local