Added postman collection for backend API

[dnviti]

No description provided.

[nginxproxymanagerci]

CI Error:

/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
certbot-node: Pulling from nginxproxymanager/nginx-full
b0a0cf830b12: Pulling fs layer
52c57b062a50: Pulling fs layer
7d2606ea5883: Pulling fs layer
e3ee28b7868d: Pulling fs layer
f1af7b0642b3: Pulling fs layer
65249026dc16: Pulling fs layer
6c5f68e9df5e: Pulling fs layer
f6475780ec17: Pulling fs layer
1808eb381f04: Pulling fs layer
725d15fd3a15: Pulling fs layer
06c623cf6295: Pulling fs layer
f336975ffb9a: Pulling fs layer
09dd9e774ffc: Pulling fs layer
5eb5c6e2a280: Pulling fs layer
36525cabfb0a: Pulling fs layer
21b09b432438: Pulling fs layer
cde67a2372ef: Pulling fs layer
7d25651c1020: Pulling fs layer
b986204d7fe7: Pulling fs layer
df1b7fd3bc56: Pulling fs layer
52a15764893d: Pulling fs layer
785217f17e7b: Pulling fs layer
9af3aa3f8717: Pulling fs layer
b0a0cf830b12: Waiting
52c57b062a50: Waiting
7d2606ea5883: Waiting
e3ee28b7868d: Waiting
f1af7b0642b3: Waiting
65249026dc16: Waiting
6c5f68e9df5e: Waiting
09dd9e774ffc: Waiting
5eb5c6e2a280: Waiting
36525cabfb0a: Waiting
f6475780ec17: Waiting
21b09b432438: Waiting
cde67a2372ef: Waiting
1808eb381f04: Waiting
725d15fd3a15: Waiting
06c623cf6295: Waiting
f336975ffb9a: Waiting
7d25651c1020: Waiting
b986204d7fe7: Waiting
df1b7fd3bc56: Waiting
52a15764893d: Waiting
785217f17e7b: Waiting
9af3aa3f8717: Waiting