Docker: a build context that isn't 3.6GB, and health you can see

The all-in-one image builds from the project root, and Docker only reads
.dockerignore from the context root — so the ones under "API Server" and
"Web App" never applied to it and every AIO build shipped the whole tree,
"Phone App/build" included. A root .dockerignore allow-lists the paths that
build actually copies.

The dev split stack passed neither PB_BOOTSTRAP nor the SUPERADMIN vars, so
it created the schema and then no user to log in with. It passes them now,
and .env.example says so.

WEBAPP_URL was never set anywhere, leaving the panel status page probing
localhost:8090 — itself — and always reporting the Web App as down. Each
compose file now points it at wherever the Web App really is, and the BFF
grew a real /healthz instead of letting the SPA fallback answer probes with
index.html and look healthy no matter what.

In the AIO, PocketBase and the API Server drop to an unprivileged user;
only nginx stays root to bind :80. The entrypoint takes ownership of the
two volumes first, so data written by the old root-only image stays
writable. All three images carry a HEALTHCHECK, every compose file declares
one too (so depends_on still gates against an older pulled image), and
web-app waits for the API Server to be serving rather than merely started.

Also: pinned alpine/golang/node and PocketBase 0.39.11, so a rebuild months
from now produces the same image; nginx forwards WebSocket upgrades instead
of stripping them, with the map in http.d where Alpine actually reads it;
and a .gitattributes keeps entrypoint.sh on LF, because a CRLF shebang from
a Windows clone fails at container start with "no such file or directory".

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

API Server/Dockerfile

@@ -3,7 +3,7 @@
 # --- Build stage -------------------------------------------------------------
 # Compile a static Go binary. The Vue panel is pre-built into internal/api/dist
 # and embedded via //go:embed, so no Node toolchain is needed here.
-FROM golang:1.26-alpine AS build
+FROM golang:1.26-alpine3.24 AS build
 
 WORKDIR /src
 
@@ -20,7 +20,7 @@ COPY . .
 RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -ldflags="-s -w" -o /out/api-server ./cmd/server
 
 # --- Runtime stage -----------------------------------------------------------
-FROM alpine:latest
+FROM alpine:3.24
 
 # HTTPS calls to PocketBase need CA certificates; tzdata for correct timestamps.
 RUN apk add --no-cache ca-certificates tzdata
@@ -47,4 +47,11 @@ ENV API_ADDR=:8080 \
 EXPOSE 8080
 
 USER app
+
+# Liveness only: /healthz answers 200 as soon as the process is serving, and
+# does not depend on PocketBase, so a database outage does not mark the
+# container unhealthy. Lets compose gate dependants on condition: service_healthy.
+HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \
+    CMD wget -qO- http://127.0.0.1:8080/healthz >/dev/null 2>&1 || exit 1
+
 ENTRYPOINT ["/usr/local/bin/api-server"]