Clearview stack: Postgres config + TZ in env, only pin Postgres image

Revert the over-hardcoding: Postgres connection settings (host/port/db/user/
password) and TZ are env vars again. The only value fixed in the compose is the
Postgres image version (functional dependency). No silent defaults remain
(${VAR:?}); POSTGRES_PASSWORD ships empty and must be set in Portainer.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/changelog-develop.md

@@ -6,7 +6,7 @@ This file documents changes on the develop branch of this project.
 
 ### Changed
 - Reworked `stack/docker-compose.yml` + `.env` so the stack has **no baked default values**: every per-deployment value is required via `${VAR:?...}`, so `docker compose`/Portainer refuses to start when one is missing instead of falling back to an insecure default (the old `.env` shipped `POSTGRES_PASSWORD=clearview`). Verified: rendering fails with `required variable POSTGRES_PASSWORD is missing a value` when unset.
-- Fixed structural constants are now hardcoded in the compose file (DB name/user `clearview`, internal host `postgres`, port `5432`, `TZ`), not env vars. The committed `.env` only carries the per-deploy values: `CLEARVIEW_IMAGE_TAG` (dev|latest), `CLEARVIEW_ENV` (dev|prod) and the host ports. Secrets (`POSTGRES_PASSWORD`, optional `ONBOARDING_*`) are documented but intentionally not shipped — they must be set in Portainer's stack environment.
+- All configurable values stay in the env (referenced via `${VAR:?}`); the **only** thing pinned in the compose is the Postgres image version (`postgres:16-alpine`), since the app's migrations depend on it. Postgres config (`POSTGRES_HOST`/`PORT`/`DB`/`USER`/`PASSWORD`) and `TZ` are env vars. The committed `.env` is the dev baseline (image tag, env, ports, TZ, Postgres host/port/db/user); `POSTGRES_PASSWORD` ships empty (no default — set in Portainer, else the stack won't start) and `ONBOARDING_*` are optional.
 - **Per-environment naming**, driven by `CLEARVIEW_ENV`: container names become `clearview-<env>` / `clearview-postgres-<env>` / `clearview-adminer-<env>` and the Postgres data dir `/docker/appdata/clearview-<env>/postgres`, so a dev and a prod stack run side by side without name/volume clashes. The image tag stays its own variable (`CLEARVIEW_IMAGE_TAG`); Compose can't map `latest`→`prod` from a single value, so tag and env are two variables (chosen over `-latest` naming). DB DNS still uses the `postgres` service name, so `DATABASE_URL` is unaffected by the container rename.
 
 ## 2026-06-19 — Path-prefix routing support (run behind the landing proxy)

stack/.env

@@ -1,28 +1,31 @@
 # Clearview stack environment.
 #
-# Only the values that genuinely differ per deployment live here; everything
-# structural (DB name/user, internal host/port, TZ) is fixed in the compose
-# file. The compose uses ${VAR:?...} for required values, so the stack REFUSES
-# to start when a required variable is missing — there are no silent defaults.
+# All per-deployment values live here. The compose references them with
+# ${VAR:?...}, so the stack refuses to start when a required value is missing —
+# there are no silent defaults. The only thing pinned in the compose itself is
+# the Postgres image version (postgres:16-alpine), because the app's migrations
+# depend on it.
 #
-# This file is the dev baseline. For the prod stack, override CLEARVIEW_IMAGE_TAG
-# (latest), CLEARVIEW_ENV (prod) and the ports in Portainer's stack environment.
-#
-# CLEARVIEW_IMAGE_TAG drives the image tag; CLEARVIEW_ENV drives the container
-# names (clearview-<env>, clearview-postgres-<env>, clearview-adminer-<env>) and
-# the Postgres data dir (/docker/appdata/clearview-<env>/postgres), so a dev and
-# a prod stack run side by side without clashing.
+# This is the dev baseline. For the prod stack, override CLEARVIEW_IMAGE_TAG
+# (latest), CLEARVIEW_ENV (prod) and the host ports in Portainer's stack
+# environment. CLEARVIEW_ENV drives the container names (clearview-<env>, …) and
+# the Postgres data dir (/docker/appdata/clearview-<env>/postgres) so dev and
+# prod run side by side.
 
 CLEARVIEW_IMAGE_TAG=dev
 CLEARVIEW_ENV=dev
 CLEARVIEW_PORT=8080
 ADMINER_PORT=8081
+TZ=Europe/Amsterdam
 
-# --- Required, NOT shipped here (set in Portainer's stack environment) -------
-# The stack will not start until POSTGRES_PASSWORD is provided.
-#   POSTGRES_PASSWORD=...
+POSTGRES_HOST=postgres
+POSTGRES_PORT=5432
+POSTGRES_DB=clearview
+POSTGRES_USER=clearview
+# No default — set this in Portainer's stack environment, or the stack won't start.
+POSTGRES_PASSWORD=
 
-# --- Optional: Microsoft onboarding OAuth (leave unset if unused) ------------
-#   ONBOARDING_CLIENT_ID=...
-#   ONBOARDING_CLIENT_SECRET=...
-#   ONBOARDING_REDIRECT_URI=...
+# Optional: Microsoft onboarding OAuth (leave blank if unused).
+ONBOARDING_CLIENT_ID=
+ONBOARDING_CLIENT_SECRET=
+ONBOARDING_REDIRECT_URI=

stack/docker-compose.yml

@@ -6,8 +6,8 @@ services:
     ports:
       - "${CLEARVIEW_PORT:?set CLEARVIEW_PORT}:80"
     environment:
-      TZ: Europe/Amsterdam
-      DATABASE_URL: postgresql://clearview:${POSTGRES_PASSWORD:?set POSTGRES_PASSWORD}@postgres:5432/clearview
+      TZ: ${TZ:?set TZ}
+      DATABASE_URL: postgresql://${POSTGRES_USER:?set POSTGRES_USER}:${POSTGRES_PASSWORD:?set POSTGRES_PASSWORD}@${POSTGRES_HOST:?set POSTGRES_HOST}:${POSTGRES_PORT:?set POSTGRES_PORT}/${POSTGRES_DB:?set POSTGRES_DB}
       ONBOARDING_CLIENT_ID: ${ONBOARDING_CLIENT_ID}
       ONBOARDING_CLIENT_SECRET: ${ONBOARDING_CLIENT_SECRET}
       ONBOARDING_REDIRECT_URI: ${ONBOARDING_REDIRECT_URI}
@@ -20,14 +20,14 @@ services:
     container_name: clearview-postgres-${CLEARVIEW_ENV:?set CLEARVIEW_ENV to dev or prod}
     restart: unless-stopped
     environment:
-      POSTGRES_DB: clearview
-      POSTGRES_USER: clearview
+      POSTGRES_DB: ${POSTGRES_DB:?set POSTGRES_DB}
+      POSTGRES_USER: ${POSTGRES_USER:?set POSTGRES_USER}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?set POSTGRES_PASSWORD}
-      TZ: Europe/Amsterdam
+      TZ: ${TZ:?set TZ}
     volumes:
       - /docker/appdata/clearview-${CLEARVIEW_ENV}/postgres:/var/lib/postgresql/data
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U clearview -d clearview"]
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}"]
       interval: 10s
       timeout: 5s
       retries: 5
@@ -43,4 +43,4 @@ services:
     ports:
       - "${ADMINER_PORT:?set ADMINER_PORT}:8080"
     environment:
-      ADMINER_DEFAULT_SERVER: postgres
+      ADMINER_DEFAULT_SERVER: ${POSTGRES_HOST:?set POSTGRES_HOST}