fix(telega): build the server image locally to meet tdlib 1.8.66HEADmain

MELPA's 2026-08-18 telega raised telega-tdlib-min-version to 1.8.66. The pinned upstream image ships 1.8.64, so telega killed its own server on every launch. Upstream's only 1.8.66 image won't start: it's missing libglycin (zevlg/telega.el#596).

docker/telega-server/Dockerfile derives from that upstream image, pinned by digest, and adds the one missing package. make telega-image builds it as cj/telega-server:1.8.66-glycin, cj/telega-docker-image defaults to that tag, and a test holds the two equal. cj/telega now refuses to launch with a make telega-image hint when the image isn't built, since docker would otherwise try to pull a local-only tag from the registry. setup-telega.sh points at the make target instead of M-x telega-server-build.

I chose the local build over pinning the telega package back to 20260706.2147. The derived image satisfies both machines' floors. package.el can't pin a version and MELPA serves only its latest build, so nothing would enforce the package pin. When #596 is fixed upstream the pin returns to a registry digest and the Dockerfile goes.

1 files changed, 13 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index b8580912..fd759f30 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@
 #   make compile-file FILE=  - Byte-compile one file with the project load path
 #   make lint              - Run all linters (checkdoc, package-lint, elisp-lint)
 #   make bootstrap         - Install every package headlessly (fresh machine)
+#   make telega-image      - Build the telega-server container image
 #   make profile           - Profile Emacs startup performance
 #   make clean             - Remove test artifacts and compiled files
 #   make clean-compiled    - Remove .elc/.eln files only
@@ -55,7 +56,7 @@ EMACS_TEST = $(EMACS_BATCH) -L $(TEST_DIR) -L $(MODULE_DIR)
 .PHONY: help targets test test-all test-unit test-integration test-file test-name \
         test-bash theme-studio-test theme-studio-check theme-studio-coverage theme-studio-gen theme-studio-open theme-studio-theme theme-studio-theme-load theme-studio-theme-reload deploy-wip \
         benchmark coverage coverage-summary coverage-clean \
-        validate-parens validate-modules compile compile-file lint bootstrap profile \
+        validate-parens validate-modules compile compile-file lint bootstrap telega-image profile \
         task-sorted \
         clean clean-compiled clean-tests reset
 
@@ -102,6 +103,7 @@ help:
 	@echo ""
 	@echo "  Utilities:"
 	@echo "    make bootstrap         - Install every package headlessly (fresh machine)"
+	@echo "    make telega-image      - Build the telega-server container image"
 	@echo "    make profile           - Profile Emacs startup performance"
 	@echo "    make clean             - Remove test artifacts and compiled files"
 	@echo "    make clean-compiled    - Remove .elc/.eln files only"
@@ -457,6 +459,16 @@ lint:
 bootstrap:
 	@bash scripts/bootstrap-packages.sh
 
+# telega-server container image.  Built locally from a digest-pinned upstream
+# base plus the library upstream forgot (see docker/telega-server/Dockerfile).
+# The tag here is the source of truth: `cj/telega-docker-image' in
+# modules/telega-config.el must name the same one, and a test holds them equal.
+TELEGA_IMAGE = cj/telega-server:1.8.66-glycin
+
+telega-image:
+	@docker build -t $(TELEGA_IMAGE) docker/telega-server
+	@echo "built $(TELEGA_IMAGE)"
+
 profile:
 	@echo "Profiling Emacs startup..."
 	@if [ -f "$(EMACS_HOME)/early-init.el" ]; then \