Consolidate Docker deployment into a single PaperJet container

docker-entrypoint.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+
+set -Eeuo pipefail
+
+uvicorn --app-dir /app app.main:app \
+    --host 127.0.0.1 \
+    --port 8000 \
+    --workers 1 &
+backend_pid=$!
+
+nginx -g "daemon off;" &
+nginx_pid=$!
+
+stop_children() {
+    kill -TERM "$backend_pid" "$nginx_pid" 2>/dev/null || true
+    wait "$backend_pid" 2>/dev/null || true
+    wait "$nginx_pid" 2>/dev/null || true
+}
+
+shutdown() {
+    trap - TERM INT
+    stop_children
+    exit 143
+}
+
+trap shutdown TERM INT
+
+# If either service exits, stop the other one and let Docker restart/report the
+# container rather than leaving a partially working instance running.
+set +e
+wait -n "$backend_pid" "$nginx_pid"
+exit_code=$?
+set -e
+
+stop_children
+exit "$exit_code"