added content type to endpoint.go #42

	name: Build and run all tests
	on:
	push:
	branches:
	- main
	pull_request:

	jobs:
	test:
	strategy:
	matrix:
	go-version: [1.20.x]
	os: [ubuntu-latest, macos-latest]
	runs-on: ubuntu-latest
	steps:
	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version: ${{ matrix.go-version }}

	- name: Cache go modules
	uses: actions/cache@v4
	with:
	path: ~/go/pkg/mod
	key: ${{ runner.os }}-go-${{ hashFiles('go.sum') }}
	restore-keys: ${{ runner.os }}-go-${{ hashFiles('go.sum') }}

	- name: Check out code
	uses: actions/checkout@v4

	- name: Get and verify dependencies
	run: go mod download && go mod verify

	- name: Go vet
	run: go vet .

	- name: Go test
	run: go test .

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