Edit upstreams, added swagger docs

backend/internal/api/schema/update_upstream.go

@@ -0,0 +1,69 @@
+package schema
+
+import "fmt"
+
+// UpdateUpstream is the schema for incoming data validation
+func UpdateUpstream() string {
+	return fmt.Sprintf(`
+	{
+		"type": "object",
+		"additionalProperties": false,
+		"minProperties": 1,
+		"properties": {
+			"name": %s,
+			"nginx_template_id": {
+				"type": "integer",
+				"minimum": 1
+			},
+			"advanced_config": %s,
+			"ip_hash": {
+				"type": "boolean"
+			},
+			"ntlm": {
+				"type": "boolean"
+			},
+			"keepalive": {
+				"type": "integer"
+			},
+			"keepalive_requests": {
+				"type": "integer"
+			},
+			"keepalive_time": {
+				"type": "string"
+			},
+			"keepalive_timeout": {
+				"type": "string"
+			},
+			"servers": {
+				"type": "array",
+				"minItems": 1,
+				"items": {
+					"type": "object",
+					"additionalProperties": false,
+					"required": [
+						"server"
+					],
+					"properties": {
+						"server": %s,
+						"weight": {
+							"type": "integer"
+						},
+						"max_conns": {
+							"type": "integer"
+						},
+						"max_fails": {
+							"type": "integer"
+						},
+						"fail_timeout": {
+							"type": "integer"
+						},
+						"backup": {
+							"type": "boolean"
+						}
+					}
+				}
+			}
+		}
+	}
+`, stringMinMax(1, 100), stringMinMax(0, 1024), stringMinMax(2, 255))
+}