build: Use gcr/distroless for better scratch image (#99)

* build: air.toml ignore examples directory

* chore: Debug log failed webhook destination publish response

* build: air.toml exclude dist directory

* build: Use gcr/distroless for better scratch image

Author: alexluong

.air.toml

@@ -5,6 +5,6 @@ tmp_dir = "tmp"
   cmd = "go build -o tmp/main cmd/outpost/main.go"
   bin = "tmp/main"
   delay = 100
-  exclude_dir = ["internal/portal/node_modules"]
+  exclude_dir = ["examples", "dist", "internal/portal/node_modules"]
   include_ext = ["go"]
   include_file = ["go.mod", "go.sum", ".env"]

build/Dockerfile.goreleaser

@@ -1,3 +1,3 @@
-FROM scratch
-COPY outpost /bin/outpost
-ENTRYPOINT ["/bin/outpost"]
+FROM gcr.io/distroless/base
+COPY outpost outpost
+ENTRYPOINT ["./outpost"]

internal/destinationadapter/adapters/webhook/webhook.go

@@ -5,6 +5,8 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"io"
+	"log"
 	"net/http"
 
 	"github.com/hookdeck/outpost/internal/destinationadapter/adapters"
@@ -77,6 +79,12 @@ func makeRequest(ctx context.Context, url string, event *adapters.Event) error {
 
 	if resp.StatusCode >= 400 {
 		// TODO: improve error handling to store response value
+		// TODO: improve logger
+		log.Println(resp)
+		if bodyBytes, err := io.ReadAll(resp.Body); err == nil {
+			bodyString := string(bodyBytes)
+			log.Println("request error body:", bodyString)
+		}
 		return errors.New("request failed")
 	}