Adding readme with minimal details about bash version

README

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+Some tests building a simple API that determines whether an input string contains every lower-case character in the latin alphabet
+
+# Bash version
+
+Sample output
+
+'''
+# Sample string with all alphabet characters
+[jceresini@slartibartfast ~]$ curl -X POST -d 'The quick brown fox jumps over the lazy dog' http://test.ceresini.com/contains_all_chars.sh
+
+{"error": null, "result": true}
+
+# Sample string that doesn't contain all alphabet characters
+[jceresini@slartibartfast ~]$ curl -X POST -d 'This string does not contain many letters of the alphabet' http://test.ceresini.com/contains_all_chars.sh
+
+{"error": null, "result": false}
+
+# Hitting API endpoint with GET method
+[jceresini@slartibartfast ~]$ curl http://test.ceresini.com/contains_all_chars.sh
+
+{"error": "Invalid http method", "result": null}
+'''
+