[API] Fix issues related to swaggo v1.8.10 (#96)

### Summary

Updating from swaggo v1.8.9 to v1.8.10 caused issues with the generated swagger file.

The issue was solved by moving the handler for `GET /swagger.json` outside the `/doc` directory.

api/docs/controllers.go

@@ -1,45 +0,0 @@
-package docs
-
-import (
-	_ "embed"
-	"fmt"
-
-	"github.com/gofiber/fiber/v2"
-	"go.uber.org/zap"
-)
-
-type Controller struct {
-	logger *zap.Logger
-}
-
-func NewController(logger *zap.Logger) *Controller {
-
-	l := logger.With(zap.String("module", "DocsController"))
-
-	return &Controller{logger: l}
-}
-
-//go:embed swagger.json
-var swagger []byte
-
-// GetSwagger godoc
-// @Description Returns the swagger specification for this API.
-// @Tags Wormscan
-// @ID swagger
-// @Success 200 {object} object
-// @Failure 400
-// @Failure 500
-// @Router /swagger.json [get]
-func (c *Controller) GetSwagger(ctx *fiber.Ctx) error {
-
-	written, err := ctx.
-		Response().
-		BodyWriter().
-		Write(swagger)
-
-	if written != len(swagger) {
-		return fmt.Errorf("partial write to response body: wrote %d bytes, expected %d", written, len(swagger))
-	}
-
-	return err
-}

api/docs/docs.go

@@ -1,5 +1,4 @@
-// Package docs GENERATED BY SWAG; DO NOT EDIT
-// This file was generated by swaggo/swag
+// Code generated by swaggo/swag. DO NOT EDIT
 package docs
 
 import "github.com/swaggo/swag"

api/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	_ "embed"
 	"fmt"
 	"net/http"
 	"os"
@@ -18,7 +19,6 @@ import (
 	"github.com/improbable-eng/grpc-web/go/grpcweb"
 
 	ipfslog "github.com/ipfs/go-log/v2"
-	"github.com/wormhole-foundation/wormhole-explorer/api/docs"
 	"github.com/wormhole-foundation/wormhole-explorer/api/handlers/governor"
 	"github.com/wormhole-foundation/wormhole-explorer/api/handlers/guardian"
 	"github.com/wormhole-foundation/wormhole-explorer/api/handlers/heartbeats"
@@ -48,6 +48,31 @@ func healthOk(ctx *fiber.Ctx) error {
 	return ctx.SendString("Ok")
 }
 
+//go:embed docs/swagger.json
+var swagger []byte
+
+// GetSwagger godoc
+// @Description Returns the swagger specification for this API.
+// @Tags Wormscan
+// @ID swagger
+// @Success 200 {object} object
+// @Failure 400
+// @Failure 500
+// @Router /swagger.json [get]
+func GetSwagger(ctx *fiber.Ctx) error {
+
+	written, err := ctx.
+		Response().
+		BodyWriter().
+		Write(swagger)
+
+	if written != len(swagger) {
+		return fmt.Errorf("partial write to response body: wrote %d bytes, expected %d", written, len(swagger))
+	}
+
+	return err
+}
+
 // @title Wormhole Guardian API
 // @version 1.0
 // @description Wormhole Guardian API
@@ -106,7 +131,6 @@ func main() {
 	heartbeatsService := heartbeats.NewService(heartbeatsRepo, rootLogger)
 
 	// Setup controllers
-	docsCtrl := docs.NewController(rootLogger)
 	vaaCtrl := vaa.NewController(vaaService, rootLogger)
 	observationsCtrl := observations.NewController(obsService, rootLogger)
 	governorCtrl := governor.NewController(governorService, rootLogger)
@@ -128,7 +152,7 @@ func main() {
 		Format: "level=info timestamp=${time} method=${method} path=${path} status${status} request_id=${locals:requestid}\n",
 	}))
 
-	app.Get("/swagger.json", docsCtrl.GetSwagger)
+	app.Get("/swagger.json", GetSwagger)
 
 	api := app.Group("/api/v1")
 	api.Use(cors.New()) // TODO CORS restrictions?