add entrypoint

[cfaur09]

we need a public docker image that contains api-service to use in other projects too.

added dockerfile, docker entrypoint script

[github-actions]

k6 load testing comparison.
Base Commit Hash: 595359b
Target Commit Hash: fd7fceb

Metric	Base				Target				Diff
	Avg	Max	90	95	Avg	Max	90	95	Avg	Max	90	95
Mex	51.36	299.27	58.67	67.90	49.88	205.20	54.81	64.38	-2.89% ✅	-31.43% ✅	-6.58% ✅	-5.19% ✅
Nodes	51.52	394.77	58.80	67.80	51.06	941.89	54.84	64.07	-0.89% ✅	+138.59% 🔴	-6.74% ✅	-5.50% ✅
Transactions	61.98	1458.97	61.38	75.64	60.05	1569.99	57.37	70.01	-3.12% ✅	+7.61% 🔴	-6.54% ✅	-7.44% ✅
Pool	51.88	717.39	59.22	67.63	49.95	388.75	54.74	64.69	-3.71% ✅	-45.81% ✅	-7.56% ✅	-4.35% ✅
Blocks	57.22	1090.95	61.96	73.20	55.83	1054.31	56.43	69.52	-2.43% ✅	-3.36% ✅	-8.93% ✅	-5.04% ✅
Tokens	51.72	508.59	59.00	68.15	49.89	404.29	54.70	64.47	-3.52% ✅	-20.51% ✅	-7.30% ✅	-5.40% ✅
Accounts	51.83	482.25	58.69	68.09	50.70	583.98	54.95	64.81	-2.19% ✅	+21.10% 🔴	-6.37% ✅	-4.81% ✅
Test Run Duration	60004.99				60002.34

Legend: Avg - Average Response Time, Max - Maximum Response Time, 90 - 90th Percentile, 95 - 95th Percentile
All times are in milliseconds.