Do our best to add the porter temporary directory to .dockerignore.

ErrorRetryer does exponential backoff of the action function which returns an error.

Do our best to add the porter temporary directory to .gitignore.

SuccessRetryer does exponential backoff of the action function which returns a boolean Here's some math around the count input count 1 == cumulative time of 2 seconds or ~0 mins count 2 == cumulative time of 6 seconds or ~0 mins count 3 == cumulative time of 14 seconds or ~0 mins count 4 == cumulative time of 30 seconds or ~0 mins count 5 == cumulative time of 62 seconds or ~1 mins count 6 == cumulative time of 126 seconds or ~2 mins count 7 == cumulative time of 254 seconds or ~4 mins count 8 == cumulative time of 510 seconds or ~8 mins count 9 == cumulative time of 1022 seconds or ~17 mins count 10 == cumulative time of 2046 seconds or ~34 mins.