Character data microservice for our online game framework.
GET /characters Returns json data about every character.
GET /characters/{id} Returns json data about a specific character. id=[string]
GET /characters/user/{user_id} Returns the list of characters of a user. user_id=[string]
GET /health/live Returns a Status OK when live.
GET /health/ready Returns a Status OK when ready or an error when dependencies are not available.
POST /characters Add new character with specific data. 
Data Params
{
  "user_id": "string, required",
  "name":    "string, required",
}PUT /characters Update character data 
Data Params
{
  "id":      "string, required",
  "user_id": "string",
  "name":    "string",
}DELETE /characters/{id} Delete a character.  id=[string]