1 dockerfile for obp api

[chrisjsimpson]

Ref #1

Fix #1

• added Dockerfile
• Reduce container re-build time from 22mins -> 2 seconds (depending on cache expiry, Using --mount=type=cache )

time podman build -t obp-api .

...

real  22m55.899s
user  37m35.264s
sys  1m48.375s

Then rebuilds will be much faster:

time podman build -t obp-api .

...
real  0m2.746s
user  0m2.754s
sys  0m1.532s

Note if cache expires or a layer changes the build will be slower, but not the worst case;

time podman build -t obp-api .
...
real	6m31.714s
user	18m43.876s
sys	0m32.894s

If you do want to build with no cache:

time podman build --no-cache -t obp-api .

# long time