fix(auth): change SameSite to Lax for redirect compatibility

src/core/auth/oidc.go

@@ -137,7 +137,7 @@ func (h *OIDCHandler) Callback(w http.ResponseWriter, r *http.Request) {
 		Domain:   h.config.Domain,
 		MaxAge:   3600,
 		HttpOnly: true,
-		SameSite: http.SameSiteStrictMode,
+		SameSite: http.SameSiteLaxMode,
 	})
 
 	http.Redirect(w, r, "/", http.StatusFound)

src/main.go

@@ -130,7 +130,7 @@ func main() {
 			Domain:   cfg.OIDC.Domain,
 			MaxAge:   -1,
 			HttpOnly: true,
-			SameSite: http.SameSiteStrictMode,
+			SameSite: http.SameSiteLaxMode,
 		})
 		// Redirect to Authelia's logout page to clear Authelia session
 		logoutURL := fmt.Sprintf("%s/logout", cfg.OIDC.IssuerURL)