Debug proxy, duck as fs

- Add proxy endpoint for proxying a message to a target's inbox
- Change duck embed to fs based to fix mk not understanding it

web/shared/clientRfc9421.go

@@ -5,10 +5,12 @@ import (
 	"crypto/sha256"
 	"crypto/x509"
 	"encoding/base64"
+	"io"
 	"net/http"
 	"slices"
 	"time"
 
+	"github.com/rs/zerolog/log"
 	"github.com/yaronf/httpsign"
 
 	"git.mstar.dev/mstar/linstrom/config"
@@ -77,11 +79,16 @@ func RequestSignedCavage(
 	body []byte,
 	actor *models.User,
 ) (*http.Response, error) {
-	req, err := NewRequest(method, target, nil)
+	var bodyReader io.Reader
+	if body != nil {
+		bodyReader = bytes.NewReader(body)
+	}
+	req, err := NewRequest(method, target, bodyReader)
 	if err != nil {
 		return nil, err
 	}
 	req.Header.Add("Accept", "application/activity+json")
+	req.Header.Add("Content-Type", "application/activity+json")
 
 	var keyBytes []byte
 	if config.GlobalConfig.Experimental.UseEd25519Keys {
@@ -101,6 +108,7 @@ func RequestSignedCavage(
 	if err != nil {
 		return nil, err
 	}
+	log.Debug().Bytes("body", body).Any("headers", req.Header).Msg("Sending signed request")
 	return RequestClient.Do(req)
 }
 
@@ -119,7 +127,7 @@ func applyBodyHash(headers http.Header, body []byte) error {
 		return nil
 	}
 	hash := sha256.Sum256(body)
-	based := base64.StdEncoding.EncodeToString(hash[:])
-	headers.Set("Digest", "SHA-256="+based)
+	header := "SHA-256=" + base64.StdEncoding.EncodeToString(hash[:])
+	headers.Set("Digest", header)
 	return nil
 }