Received "cannot execute binary file: Exec format error" while pushing golang project to heroku. Why is this happening?

I have been recently attempting to deploy a simple golang app to heroku using the same method I used to deploy previous ones, and I'm running into error with my procfile execution.

2021-07-06T23:30:28.000000+00:00 app[api]: Build started by user user@yahoo.com
2021-07-06T23:30:40.271575+00:00 app[api]: Release v7 created by user user@yahoo.com
2021-07-06T23:30:40.271575+00:00 app[api]: Deploy 0d19e552 by user user@yahoo.com
2021-07-06T23:30:40.909377+00:00 heroku[web.1]: State changed from crashed to starting
2021-07-06T23:30:42.049118+00:00 heroku[web.1]: Starting process with command `bin/main`
2021-07-06T23:30:45.582197+00:00 app[web.1]: bash: bin/main: cannot execute binary file: Exec format error
2021-07-06T23:30:45.646220+00:00 heroku[web.1]: Process exited with status 126
2021-07-06T23:30:45.722720+00:00 heroku[web.1]: State changed from starting to crashed
2021-07-06T23:30:57.000000+00:00 app[api]: Build succeeded

2021-07-06T23:45:41.986316+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=testing-my-message-app.herokuapp.com request_id=fd3a8259-82dc-489f-b206-060ec0d8f8f6 fwd="67.81.209.179" dyno= connect= service= status=503 bytes= protocol=https      
2021-07-06T23:45:42.522223+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=testing-my-message-app.herokuapp.com request_id=f3268609-cdcc-4c16-af24-f7dfa5568030 fwd="67.81.209.179" dyno= connect= service= status=503 bytes= protocol=https

I tried running both go build -o bin/main and go build -o bin/main -v .to build the binary file, but heroku is unable to build it for due to format error. How can I fix this? I'm running on a 64 bit window platform for reference.

Also, just in case, here is the code I am trying to deploy.

package main

import (
	"fmt"
	"log"
	"net/http"
	"os"
	"strconv"

	"github.com/go-chi/chi"
	"github.com/go-chi/render"
	"github.com/joho/godotenv"
)

type m map[string]interface{}

func main(){
	godotenv.Load()

	router := chi.NewRouter()
	words := m{
		"black": 10,
		"red": 7,
		"pink": 0,
		"yellow": 5,
		"blue": 9,
	}

	router.Get("/all", func(res http.ResponseWriter, req *http.Request) {
		render.JSON(res, req, words)
	})

	router.Get("/add-color-rating/{color}/{rating}", func(res http.ResponseWriter, req *http.Request) {
		color  := chi.URLParam(req, "color")
		rating, _ := strconv.Atoi(chi.URLParam(req, "rating"))

		words[color] = rating
		render.JSON(res, req, m{"added-rating": m{color: rating}})
	})
	
	fs := http.FileServer(http.Dir("./static"))
	router.Handle("/static/*", http.StripPrefix("/static", fs))

	fmt.Println("running on port:", os.Getenv("PORT"))
	log.Fatal(http.ListenAndServe(os.Getenv("PORT"), router))
}

It could also be that you are trying to run an executable compiled for a specific architecture on a platform with a different architecture. Try specifying the the target os and architecture in which you expect to run the build as follows.

env GOOS=linux GOARCH=arm64 go build -o bin/main

If you're trying to build files in the bin/main folder, you need to do this:

go build bin/main

If you are trying to build in the current folder, you need to do this:

go build -o bin/main.exe

<https://golang.org/cmd/go#hdr-Compile_packages_and_dependencies>