redfix gitea fix v2 (-s seed, v3)

compose.postgres.yml

@@ -10,7 +10,7 @@ services:
     secrets:
       - db_password
   db:
-    image: postgres:15.18
+    image: postgres:15.13
     deploy:
       labels:
         backupbot.backup.pre-hook: "/pg_backup.sh backup"

compose.yml

@@ -3,7 +3,7 @@ version: "3.8"
 
 services:
   app:
-    image: "gitea/gitea:1.26.2-rootless"
+    image: "gitea/gitea:1.24.2-rootless"
     configs:
       - source: app_ini
         target: /etc/gitea/app.ini.init

docker-setup.sh.tmpl

@@ -14,11 +14,15 @@ mkdir -p ${GITEA_CUSTOM} && chmod 0500 ${GITEA_CUSTOM}
 mkdir -p ${GITEA_TEMP} && chmod 0700 ${GITEA_TEMP}
 if [ ! -w ${GITEA_TEMP} ]; then echo "${GITEA_TEMP} is not writable"; exit 1; fi
 
-# Seed app.ini into the writable config volume (/etc/gitea) from the read-only swarm config
-# (mounted at app.ini.init). Gitea persists settings back to app.ini — e.g. it saves the
-# [oauth2] JWT_SECRET on boot since 1.24 — which crashes if app.ini is the read-only mount itself.
-# Test `! -s` (empty), not `! -f` (missing): upgrades from the old direct-mount layout leave a
-# 0-byte app.ini placeholder that still needs seeding. A non-empty app.ini is left untouched.
+# Seed app.ini into the WRITABLE config volume (/etc/gitea) from the read-only swarm config
+# (mounted at /etc/gitea/app.ini.init). Gitea must be able to PERSIST settings to app.ini — e.g.
+# Gitea 1.24+ (re)generates and SAVES the [oauth2] JWT_SECRET at LoadCommonSettings; with app.ini
+# mounted directly as a read-only swarm config this fails fatally ("open /etc/gitea/app.ini:
+# read-only file system") on (re)deploy. Seed when MISSING OR EMPTY (`! -s`, not `! -f`): upgrading
+# from a release that mounted app.ini directly as a swarm config leaves a 0-byte placeholder at
+# /etc/gitea/app.ini in the reattached config volume — `! -f` would treat that as "present" and skip,
+# leaving Gitea to boot the install wizard on an empty config. A non-empty app.ini (Gitea's persisted
+# state) is preserved across restarts; truncate/delete it to force a re-seed from the rendered config.
 if [ ! -s /etc/gitea/app.ini ]; then
   cp /etc/gitea/app.ini.init /etc/gitea/app.ini
 fi